Mobile station apparatus, base station apparatus, radio communication method and integrated circuit

ABSTRACT

Transmission power of a plurality of uplink carrier components used for radio communication by a mobile station device and a base station device is efficiently controlled. The mobile station device communicates by radio with the base station device using a plurality of component carriers. The mobile station device receives, from the base station device, downlink control information that includes information indicating radio resource assignment to a downlink shared channel disposed in any of downlink component carriers, and a TPC command to an uplink control channel in an uplink component carrier in which ACK/NACK to the downlink shared channel is transmitted.

TECHNICAL FIELD

The present invention relates to a mobile station apparatus, a basestation apparatus, a radio communication method, and a an integratedcircuit.

BACKGROUND ART

In the 3rd generation partnership project (3GPP), evolution of a radioaccess system and a radio network for the cellular mobile communication(hereinafter, referred to as “Long Term Evolution (LTE)” or “EvolvedUniversal Terrestrial Radio Access (EUTRA)”) and the radio access systemand the radio network that realize higher-speed data communicationutilizing frequencies in a wider band (hereinafter, referred to as “LongTerm Evolution-Advanced (LTE-A)” or “Advanced Evolved UniversalTerrestrial Radio Access (A-EUTRA)”) are considered.

In LTE, orthogonal frequency division multiplexing (OFDM) system that isa multi-carrier transmission is used as a downlink, and a single-carriercommunication system of SC-FDMA (Single-Carrier Frequency-DivisionMultiple Access) system that is a single-carrier transmission is used asan uplink. In LTE, such channels are allocated to the radiocommunication from a base station apparatus to a mobile stationapparatus (the downlink) as a physical broadcast channel (PBCH), aphysical downlink control channel (PDCCH), a physical downlink sharedchannel (PDSCH), a physical multicast channel (PMCH), a physical controlformat indicator channel (PCFICH), and a physical HARQ (hybrid automaticrepeat request) indicator channel (PHICH).

A physical uplink shared channel (PUSCH), a physical uplink controlchannel (PUCCH), and a physical random access channel (PRACH) areallocated to the radio communication from the mobile station apparatusto the base station apparatus (the uplink).

In LTE, to control interferences among base stations, to save electricpower of the mobile station apparatus, etc., the transmission power ofthe physical uplink control channel, the physical uplink shared channel,and a sounding reference signal that is transmitted by the mobilestation apparatus to measure the quality of the uplink channels iscontrolled using a plurality of parameters. The parameters forcontrolling the transmission power include a parameter based on a pathloss measured by the mobile station apparatus from a downlink signal andparameters notified of by the base station apparatus to the mobilestation apparatus. The parameters notified of by the base stationapparatus to the mobile station apparatus include a parameter commonlyset among mobile station apparatuses and a parameter set in each of themobile station apparatus. A “TPC command (Transmission Power Controlcommand)” is transmitted in the physical downlink control channel, thatis a parameter for each of the mobile station apparatuses and that isnotified of by the base station apparatus to the mobile stationapparatus (see Chapter V of Non-Patent Literature 1).

Section 5.3.3 of Non-Patent Literature 2 describes a format of downlinkcontrol information that is transmitted in the physical downlink controlchannel. A format indicating the allocation of radio resources of thephysical uplink shared channel includes a TPC command for the physicaluplink shared channel and the sounding reference signal. Hereinafter,this format will be referred to as “uplink grant”. A format indicatingthe allocation of radio resources of the physical downlink sharedchannel includes a TPC command for the physical uplink control channel.Hereinafter, this format will be referred to as “downlink grant” or“downlink assignment”.

A “format 3” and a “format 3A” are defined, that include only aplurality of TPC commands for a plurality of mobile station apparatuses.For the format 3 and the format 3A, the number of bits of the TPCcommands included in each format differs from that of each other.Hereinafter, the format 3 and the format 3A will be collectivelyreferred to as “format 3/3A”. The base station apparatus notifies themobile station apparatus of an identifier and one number. The mobilestation apparatus recognizes a TPC command of the number notified offrom the base station apparatus that is included in the format 3/3A thatincludes the identifier notified of from the base station apparatus as aTPC command addressed to the mobile station apparatus. To identifywhether the TPC command included in the format 3/3A is for the physicaluplink control channel or for the physical uplink shared channel and thesounding reference signal, the base station apparatus allocates twoidentifiers and allocates one number to each of these identifiers. Theidentifier corresponding to the physical uplink control channel isreferred to as “TPC-PUCCH-RNTI (Transmission Power Control-PhysicalUplink Control Channel-Radio Network Temporary Identifier)” and theidentifier corresponding to the physical uplink shared channel and thesounding reference signal is referred to as “TPC-PUSCH-RNTI(Transmission Power Control-Physical Shared Control Channel-RadioNetwork Temporary Identifier)”.

A plurality of mobile station apparatuses need to receive the format3/3A and, therefore, the format 3/3A is located in a common search spacefor all of the mobile station apparatuses to search the physicaldownlink control channel and are not located in a userequipment-specific search space that has a physical downlink controlchannel addressed to a specific mobile station apparatus disposedtherein. The format 3/3A is used for the base station apparatus totransmit the TPC command to control the transmission power of a signalin the uplink of the mobile station apparatus, when, for example, thebase station apparatus allocates no radio resources to the mobilestation apparatus in the physical uplink shared channel using the uplinkgrant and in the physical downlink shared channel using the downlinkgrant and the mobile station apparatus regularly transmits the physicaluplink shared channel, and the sounding reference signal and physicaluplink control channel for the physical downlink shared channel.

It is required to LTE-A that LTE-A has the compatibility with LTE, thatis, that a base station apparatus based on LTE-A is enabled tosimultaneously execute radio communication with both of a mobile stationapparatus based on LTE-A and that based on LTE, and a mobile stationapparatus based on LTE-A is enabled to execute radio communication withboth of a base station apparatus based on LTE-A and that based on LTE.Therefore, using the same channel structure as that of LTE is consideredfor LTE-A.

For example, a technique is proposed for LTE-A of using a plurality offrequency bands each having the same channel structure as that of LTE(hereinafter, referred to as “carrier component (CC)” or “componentcarrier (CC)”) as one frequency band (a wideband frequency band)(“frequency band aggregation”, also referred to as “spectrumaggregation”, “carrier aggregation”, “frequency aggregation”, etc.).

More specifically, in communication using the frequency bandaggregation, the physical broadcast channel, the physical downlinkcontrol channel, the physical downlink shared channel, the physicalmulticast channel, the physical control format indicator channel, andthe HARQ indicator channel are transmitted for each downlink carriercomponent, and the physical uplink shared channel, the physical uplinkcontrol channel, and the physical random access channel are allocated toeach uplink carrier component. The frequency band aggregation is atechnique that a base station apparatus and a plurality of mobilestation apparatuses simultaneously transmit and receive pieces of dataand pieces of control information using a plurality of carriercomponents such as the physical uplink control channel, the physicaluplink shared channel, the physical downlink control channel, and thephysical downlink shared channel in the uplink and the downlink (seeChapter V of Non-Patent Literature 3).

PRIOR ART DOCUMENTS Non-Patent Literatures

-   Non-Patent Literature 1: “3GPP TS36.213 v8.6.0 (2009-03)”, Mar. 17,    2009-   Non-Patent Literature 2: “3GPP TS36.212 v8.6.0 (2009-03)”, Mar. 17,    2009-   Non-Patent Literature 3: “3GPP TR36.814 v1.0.2 (2009-03)”, May, 2009

DISCLOSURE OF THE INVENTION Problems that the Invention is to Solve

However, according to the conventional techniques, a problem arises thatno method is disclosed for allocating a plurality of uplink carriercomponents to the mobile station apparatus and efficiently controllingthe transmission power of each channel of the uplink carrier componentsallocated. More specifically, according to the conventional techniques,it has not been able to indicate that the TPC command for the physicaluplink control channel included in the downlink grant is as a TPCcommand for the physical uplink control channel of which uplink carriercomponent. Thereby, another problem arises that the mobile stationapparatus applies the TPC command for the physical uplink controlchannel included in the downlink grant to an uplink carrier componentfor which no radio resource of the physical uplink control channel isallocated to the base station apparatus and, therefore, the TPC commandincluded in the downlink grant is wasted.

The present invention was conceived in view of the above circumstancesand the object thereof is to provide a mobile station apparatus, a basestation apparatus, a radio communication method, and an integratedcircuit that are able to allocate a plurality of uplink carriercomponents to the mobile station apparatus and efficiently control thetransmission power of the uplink carrier components allocated.

Means to Solve the Problems

(1) To accomplish the above purpose, the present invention is a basestation apparatus that executes radio communication with a mobilestation apparatus using a plurality of component carriers, wherein thebase station apparatus transmits to the mobile station apparatusdownlink control information that includes information indicatingallocation of radio resources to a physical downlink shared channelallocated in any one downlink component carrier, and a TPC command for aphysical uplink control channel of an uplink component carrier totransmit ACK/NACK for the physical downlink shared channel.

(2) Further, the present invention is a mobile station apparatus thatexecutes radio communication with a base station apparatus using aplurality of component carriers, wherein the mobile station apparatusreceives from the base station apparatus downlink control informationthat includes information indicating allocation of radio resources to aphysical downlink shared channel allocated in any one downlink componentcarrier, and a TPC command for a physical uplink control channel of anuplink component carrier to transmit ACK/NACK for the physical downlinkshared channel.

(3) Further, the present invention is a radio communication method by abase station apparatus that executes radio communication with a mobilestation apparatus using a plurality of component carriers, wherein thebase station apparatus transmits to the mobile station apparatusdownlink control information that includes information indicatingallocation of radio resources to a physical downlink shared channelallocated in any one downlink component carrier, and a TPC command for aphysical uplink control channel of an uplink component carrier totransmit ACK/NACK for the physical downlink shared channel.

(4) Further, the present invention is a radio communication method by amobile station apparatus that executes radio communication with a basestation apparatus using a plurality of component carriers, wherein themobile station apparatus receives from the base station apparatusdownlink control information that includes information indicatingallocation of radio resources to a physical downlink shared channelallocated in any one downlink component carrier, and a TPC command for aphysical uplink control channel of an uplink component carrier totransmit ACK/NACK for the physical downlink shared channel.

(5) Further, the present invention is an integrated circuit installed ina base station apparatus that executes radio communication with a mobilestation apparatus using a plurality of component carriers, wherein thebase station apparatus transmits to the mobile station apparatusdownlink control information that includes information indicatingallocation of radio resources to a physical downlink shared channelallocated in any one downlink component carrier, and a TPC command for aphysical uplink control channel of an uplink component carrier totransmit ACK/NACK for the physical downlink shared channel.

(6) Further, the present invention is an integrated circuit installed ina mobile station apparatus that executes radio communication with a basestation apparatus using a plurality of component carriers, wherein themobile station apparatus receives from the base station apparatusdownlink control information that includes information indicatingallocation of radio resources to a physical downlink shared channelallocated in any one downlink component carrier, and a TPC command for aphysical uplink control channel of an uplink component carrier totransmit ACK/NACK for the physical downlink shared channel.

Effect of the Invention

According to the present invention, the base station apparatus is ableto efficiently execute the transmission power control for the physicaluplink control channel of the plurality of uplink carrier componentsallocated to the mobile station apparatus.

More specifically, according to the present invention, the base stationapparatus includes in the downlink control information (the downlinkgrant) the TPC command for the physical uplink control channel of theuplink carrier component to transmit the uplink control information(ACK/NACK) for the physical downlink shared channel whose allocation ofthe radio resources is indicated by the downlink control information,and transmits the downlink control information to the mobile stationapparatus. Thereby, the base station apparatus is able to allocate theradio resources for the physical downlink shared channel using the samedownlink control information (downlink grant) and control thetransmission power of the physical uplink control channel of the uplinkcarrier component to transmit ACK/NACK for this physical downlink sharedchannel. The base station apparatus is able to efficiently execute thetransmission power control for the physical uplink control channel ofthe plurality of uplink carrier components allocated to the mobilestation apparatus.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a conceptual diagram of a radio communication system accordingto an embodiment of the present invention.

FIG. 2 is a diagram of an example of a frequency band aggregatingprocess according to the embodiment.

FIG. 3 is a schematic diagram of an example of the configuration of adownlink radio frame according to the embodiment.

FIG. 4 is a schematic diagram of an example of the configuration of anuplink radio frame according to the embodiment.

FIG. 5 is a schematic block diagram of the configuration of a basestation apparatus b1 according to the embodiment.

FIG. 6 is a diagram of an example of various kinds of settinginformation stored in a storing portion b113 according to theembodiment.

FIG. 7 is a schematic block diagram of the configuration of a mobilestation apparatus a1 according to the embodiment.

FIG. 8 is a diagram of an example of various kinds of settinginformation stored in a storing portion a113 according to theembodiment.

FIG. 9 is a diagram of an example of the configuration of a transmissionpower control format according to the embodiment.

FIG. 10 is a diagram of a method of applying a TPC command to a physicaluplink shared channel of the mobile station apparatus a1 according tothe embodiment.

FIG. 11 is a flowchart of an example of operations of the base stationapparatus b1 according to the embodiment.

FIG. 12 is a flowchart of an example of operations of the mobile stationapparatus a1 according to the embodiment.

FIG. 13 is a schematic block diagram of the configuration of a basestation apparatus b2 according to a first reference example of thepresent invention.

FIG. 14 is a diagram of an example of various kinds of settinginformation stored by a storing portion b213 according to the referenceexample.

FIG. 15 is a schematic block diagram of the configuration of a mobilestation apparatus a2 according to the first reference example of thepresent invention.

FIG. 16 is a diagram of an example of various kinds of settinginformation stored by a storing portion a213 according to the referenceexample.

FIG. 17 is a diagram of a method of applying a TPC command to a physicaluplink shared channel of the mobile station apparatus a2 according tothe reference example.

FIG. 18 is a schematic block diagram of the configuration of a basestation apparatus b3 according to a second reference example of thepresent invention.

FIG. 19 is a diagram of an example of various kinds of settinginformation stored by a storing portion b313 according to the referenceexample.

FIG. 20 is a schematic block diagram of the configuration of a mobilestation apparatus a3 according to the second reference example of thepresent invention.

FIG. 21 is a diagram of an example of various kinds of settinginformation stored by a storing portion a313 according to the referenceexample.

FIG. 22 is a diagram of a method of applying a TPC command to a physicaluplink shared channel of the mobile station apparatus a3 according tothe reference example.

EMBODIMENT OF THE INVENTION

An embodiment of the present invention will now be described in detailwith reference to the accompanying drawings.

<About Radio Communication System>

FIG. 1 is a conceptual diagram of a radio communication system accordingto a first embodiment of the present invention. In FIG. 1, the radiocommunication system includes mobile station apparatuses A1 to A3 and abase station apparatus B1. The mobile station apparatuses A1 to A3 andthe base station apparatus B1 execute communication using frequency bandaggregation described later.

FIG. 1 depicts such channels allocated to radio communication from thebase station apparatus B1 to the mobile station apparatuses A1 to A3(downlink) as a downlink pilot channel (or also referred to as “downlinkreference signal (DL RS)”), a physical broadcast channel (PBCH), aphysical downlink control channel (PDCCH), a physical downlink sharedchannel (PDSCH), a physical multicast channel (PMCH), a physical controlformat indicator channel (PCFICH), and a physical hybrid ARQ indicatorchannel (PHICH).

FIG. 1 depicts such channels allocated to radio communication from themobile station apparatuses A1 to A3 to the base station apparatus B1(uplink) as an uplink pilot channel (or also referred to as “uplinkreference signal (UL RS)”), a physical uplink control channel (PUCCH), aphysical uplink shared channel (PUSCH), and a physical random accesschannel (PRACH). Uplink reference signals include, a demodulationreference signal that is transmitted being time-multiplexed with thephysical uplink shared channel or the physical uplink control channel,and is used to compensate the propagation path for the physical uplinkshared channel and the physical uplink control channel, and a soundingreference signal that is used to estimate the state of the propagationpath for the uplink.

Hereinafter, the mobile station apparatuses A1 to A3 will be referred toas “mobile station apparatus a1” and the base station apparatus B1 willbe referred to as “base station apparatus b1”.

<About Frequency Band Aggregation>

FIG. 2 is a diagram of an example of a frequency band aggregatingprocess according to the embodiment. In FIG. 2, the axis of abscissarepresents the frequency region and the axis of ordinate represents thetime region.

As depicted in FIG. 2, a downlink sub frame D1 includes three sub framesof three carrier components (DCC-1 (Downlink Component Carrier-1),DCC-2, and DCC-3) each having a bandwidth of 20 MHz. The physicaldownlink control channel represented by an area hatched with grid linesand the physical downlink shared channel represented by an area withoutany hatching are time-multiplexed and allocated to each of the subframes of the downlink carrier components (hereinafter, referred to as“downlink carrier components”).

On the other hand, an uplink sub frame U1 includes three carriercomponents (UCC-1 (Uplink Component Carrier-1), UCC-2, and UCC-3) eachhaving a bandwidth of 20 MHz. The physical uplink control channelrepresented by an area hatched with diagonal grid lines and the physicaluplink shared channel represented by an area hatched with lines slant tothe left are frequency-multiplexed and allocated to each of the subframes of the uplink carrier components (hereinafter, referred to as“uplink carrier components”).

For example, the base station apparatus b1 locates a signal in thephysical downlink shared channel of one or each of a plurality ofdownlink carrier component(s) of the three downlink carrier componentsin a downlink sub frame, and transmits the signal(s) to the mobilestation apparatus a1. The mobile station apparatus a1 locates a signalin the physical uplink shared channel of one or each of a plurality ofuplink carrier component(s) of the three uplink carrier components in anuplink sub frame, and transmits the signal(s) to the base stationapparatus b1.

<About Downlink Radio Frame>

FIG. 3 is a schematic diagram of an example of the configuration of adownlink radio frame according to the embodiment. FIG. 3 depicts theconfiguration of the radio frame of a downlink carrier component. InFIG. 3, the axis of abscissa represents the time region and the axis ofordinate represents the frequency region.

As depicted in FIG. 3, the radio frame of the downlink carrier componentincludes a plurality of downlink physical resource block (PRB) pairs(for example, an area surrounded by a dotted line of FIG. 3). A“downlink physical resource block pair” is a unit for radio resourceallocation, etc., and includes a frequency band having a widthdetermined in advance (a PRB bandwidth) and a time slot (two slots=onesub frame).

One downlink physical resource block pair includes two downlink physicalresource blocks (PRB bandwidth×slot) that are sequential in the timeregion. One downlink physical resource block (a unit surrounded by athick line in FIG. 3) includes 12 sub carriers in the frequency regionand includes seven OFDM symbols in the time region.

In the time region, a slot comprised of seven OFDM symbols, sub framecomprised of two slots, and radio frame comprised of 10 sub frames arepresent. In the frequency region, a plurality of downlink physicalresource blocks (PRBs) are located corresponding to the bandwidth of adownlink carrier component. A unit including one sub carrier and oneOFDM symbol is referred to as “downlink resource element (RE)”.

Channels allocated in a downlink radio frame will hereinafter bedescribed.

In each downlink sub frame, for example, the physical downlink controlchannel, the physical downlink shared channel, and the downlinkreference signal are allocated. The physical downlink control channel isallocated from an OFDM symbol at the head of a sub frame, the physicaldownlink shared channel is allocated in the rest of the OFDM symbols inthe sub frame. The downlink pilot channel is not depicted in FIG. 3 tosimplify the description. However, the downlink pilot channel isallocated being diffused in the frequency region and the time region.

Signals disposed in the physical downlink control channel will bedescribed.

In the physical downlink control channel, a signal is allocated, ofdownlink control information (DCI) that includes information formatssuch as a downlink grant, an uplink grant, and a transmission powercontrol format (an information format of the physical control channelfor the transmission power control) and that is used to control thecommunication.

The downlink grant includes, information indicating the modulationscheme for the physical downlink shared channel, information indicatinga coding scheme for the physical downlink shared channel, informationindicating the allocation of the radio resources for the physicaldownlink shared channel, information on HARQ (Hybrid Automatic RepeatRequest) for the physical downlink shared channel, a TPC command(Transmission Power Control command) for the physical uplink controlchannel of an uplink carrier component to transmit ACK (ACKnowledgement;a positive response)/NACK (Negative-ACKnowledgement; a negativeresponse) for the physical downlink shared channel with which thedownlink grant indicates the allocation of the radio resources and thelike. The uplink grant includes information indicating the modulationscheme for the physical uplink shared channel, information indicatingthe coding scheme for the physical uplink shared channel, informationindicating the allocation of the radio resources for the physical uplinkshared channel, information on HARQ for the physical uplink sharedchannel and a TPC command for the physical uplink shared channel withwhich the uplink grant indicates the allocation of the radio resourcesand for the sounding reference signal of the same uplink carriercomponent as that of the physical uplink shared channel and the like.

“HARQ”, for example, is a technique which the base station apparatus b1(the mobile station apparatus a1) retransmits the signal and the mobilestation apparatus a1 (the base station apparatus b1) executes a decodingprocessing for a synthesized signal obtained by combining the signalagain received with the signal already received, when the mobile stationapparatus a1 (the base station apparatus b1) transmits success orfailure (ACK/NACK) of decoding of data information to the base stationapparatus b1 (the mobile station apparatus a1) and the mobile stationapparatus a1 (the base station apparatus b1) is unable to decode thedata information due to an error (NACK).

The transmission power control format is comprised of TPC commands forthe physical uplink shared channel or the physical uplink controlchannel of each of the uplink carrier components for the plurality ofmobile station apparatuses a1. The number of bits of one TPC commandincluded in the transmission power control format is same for all of theTPC commands included in the transmission power control format, thetransmission power control format does not simultaneously include theTPC command for the physical uplink shared channel and that for thephysical uplink control channel. The base station apparatus b1 selectsthe number of bits of one TPC command included in the transmission powercontrol format and notifies the mobile station apparatus a1 of thenumber of bits selected.

The downlink grant, the uplink grant, and the TPC command received inthe transmission power control format are applied after a predeterminedtime period elapses. In the embodiment, every time a TPC command isreceived, only the TPC command just received is applied to thetransmission power control. However, an accumulated value of the valuesof the TPC commands received so far may be applied thereto.

The downlink control information is added with a sequence acquired byperforming an exclusive OR operation a cyclic redundancy check (CRC)code produced from a bit sequence of the downlink control informationand an identifier. The mobile station apparatus a1 is able to acquirethe cyclic redundancy check code by further performing an exclusive ORoperation using the identifier allocated with the sequence. The mobilestation apparatus a1 is able to determine whether the physical downlinkcontrol channel is addressed to the mobile station apparatus a1 based onthe identifier included in this physical downlink control channel.

Each of the downlink grant and the uplink grant transmitted to aspecific mobile station apparatus a1 includes a C-RNTI (Cell-RadioNetwork Temporary Identifier) that is an identifier allocated to eachmobile station apparatus a1 by the base station apparatus b1. Thetransmission power control format includes a TPC-PUCCH-RNTI(Transmission Power Control-Physical Uplink Control Channel-RadioNetwork Temporary Identifier) or a TPC-PUSCH-RNTI (Transmission PowerControl-Physical Uplink Shared Channel-Radio Network TemporaryIdentifier) that is an identifier allocated by the base stationapparatus b1 to the plurality of mobile station apparatuses a1. Themobile station apparatus a1 determines whether the TPC command includedin the transmission power control format is for the physical uplinkcontrol channel or for the physical uplink shared channel and thesounding reference signal by estimating which one of the TPC-PUCCH-RNTIand the TPC-PUSCH-RNTI is included in the transmission power controlformat.

A signal allocated in the physical downlink shared channel will bedescribed.

A signal of data information (transport block) (hereinafter, referred toas “data signal”) is allocated in the physical downlink shared channel.The radio resources in the physical downlink shared channel areallocated using a downlink grant and are allocated in the same downlinksub frame as that of the physical downlink control channel that includesthis downlink grant. In the embodiment, the physical downlink controlchannel and the physical downlink shared channel whose allocation of theradio resources is indicated by the physical downlink control channelare allocated in the same downlink carrier component. However, thepresent invention does not limit to the above, and the downlink carriercomponent to be allocated with the physical downlink shared channel maybe identified from the downlink grant and the physical downlink controlchannel and the physical downlink shared channel whose allocation of theradio resources is indicated by the physical downlink control channelmay be allocated in different downlink carrier components.

The radio resources allocated with the physical downlink control channelwill be described.

The physical downlink control channel is allocated in one or each ofmore control channel element(s) (CCE(s)). A control channel element iscomposed of a plurality of resource element groups (REGs or alsoreferred to as “mini-CCEs”) scattered in the frequency-time region inthe downlink carrier component. A resource element group is composed offour downlink resource elements that are sequential in the frequencyregion, except the downlink reference signal, in the same OFDM symbol ofthe same downlink carrier component. For example, the physical downlinkcontrol channel is allocated in one or each of two, four, or eightcontrol channel element(s) whose numbers identifying the control channelelements are sequential.

Common search space composed of the control channel elements determinedin advance and, a user equipment-specific search space composed of sameor different control channel elements as each mobile station apparatusa1 is configured for each downlink carrier component. As to the commonsearch space and the user equipment-specific search space, a differentcommon search space and a different user equipment-specific search spaceare configured for each of the numbers of the control channel elementsthat each are allocated with the physical downlink control channel. Whenthe physical downlink control channels are allocated in one, two, four,and eight control channel elements, four user equipment-specific searchspaces are configured. The different common search spaces and thedifferent user equipment-specific search spaces may be configured usingthe same control channel elements.

Such channels are allocated in the common search space as: the physicaldownlink control channel including information addressed to theplurality of mobile station apparatuses a1 such as the transmissionpower control format; and the physical downlink control channelincluding information such as the downlink grant and the uplink grantaddressed to the specific mobile station apparatus a1. Such channel isallocated in the user equipment-specific search space as the physicaldownlink control channel that includes information such as the downlinkgrant and the uplink grant addressed to the mobile station apparatus a1monitoring the user equipment-specific search space. The base stationapparatus b1 sets a downlink carrier component to monitor and check thephysical downlink control channel in the common search space for each ofthe mobile station apparatuses a1, and notifies the mobile stationapparatus a1 of the downlink carrier component that is set. Hereinafter,the downlink carrier component to monitor and check the common searchspace set for each of the mobile station apparatuses a1 will be referredto as “anchor downlink component carrier”.

<About Uplink Radio Frame>

FIG. 4 is a schematic diagram of an example of the configuration of aradio frame in the uplink according to the embodiment. FIG. 4 depictsthe configuration of the radio frame in an uplink carrier component. InFIG. 4, the axis of abscissa represents the time region and the axis ofordinate represents the frequency region.

As depicted in FIG. 4, the radio frame of the uplink carrier componentis composed of a plurality of uplink physical resource block (PRB) pairs(for example, an area surrounded by a dotted line of FIG. 4). An uplinkphysical resource block pair is a unit for allocation of the radioresources, etc., and is composed of a frequency band having a widthdetermined in advance (a PRB bandwidth) and a time band (two slots=onesub frame).

One uplink physical resource block pair is composed of two uplinkphysical resource blocks (the PRB bandwidth×slot) that are sequential inthe time region. One uplink physical resource block (a unit surroundedby a thick line in FIG. 4) is composed of 12 sub carriers in thefrequency region and is composed of seven SC-FDMA symbols in the timeregion.

In the time region, slots each is composed of seven SC-FDMA symbols, subframes each including two slots, and a radio frame is composed of 10 subframes are present. In the frequency region, a plurality of uplinkphysical resource blocks (PRBs) are allocated corresponding to thebandwidth of the uplink carrier component. A unit is composed of one subcarrier and one SC-FDMA symbol is referred to as “uplink resourceelement (RE).

The channels allocated in the uplink radio frame will hereinafter bedescribed.

For example, the physical uplink control channel, the physical uplinkshared channel, and the uplink reference signal are allocated to each ofthe uplink sub frames.

The physical uplink control channel is allocated to uplink physicalresource block pairs at both ends of the bandwidth of the uplink carriercomponent (areas hatched with lines slant to the left). The physicaluplink control channel is diffused by a spread code in the frequencyregion and the time region and is code-multiplexed.

The physical uplink shared channel is allocated to the uplink physicalresource block pairs other than those for the physical uplink controlchannel (areas without hatching). The mobile station apparatus a1 doesnot allocate signal in both of the physical uplink control channel andthe physical uplink shared channel in one uplink sub frame.

The demodulation reference signal (not depicted) is allocated beingtime-multiplexed, to the physical uplink shared channel and the physicaluplink control channel. In the time region, the sounding referencesignal is allocated in the last SC-FDMA symbol of a sub frame at cyclesset by the base station apparatus b1 for each of the mobile stationapparatuses a1. In the frequency region, the sounding reference signalis allocated in a frequency region set by the base station apparatus b1for each of the mobile station apparatuses a1.

Signals allocated in the physical uplink control channel will bedescribed.

Such signals are allocated in the physical uplink control channel assignals of uplink control information (UCI) that is information used forcontrol of the communication such as channel quality information, and ascheduling request (SR) and ACK/NACK.

The channel quality information is the information that indicates thetransmission quality of the downlink channels measured by the mobilestation apparatus a1 using the downlink reference signal. The schedulingrequest is the information that is transmitted by the mobile stationapparatus a1 when the mobile station apparatus a1 requests the basestation apparatus b1 to allocate the radio resources for the uplink.ACK/NACK is the information that indicates success or failure ofdecoding of the physical downlink shared channel received by the mobilestation apparatus a1.

The base station apparatus b1 cyclically allocates the radio resourcesof the physical uplink control channel to transmit the channel qualityinformation and the scheduling request to each of the mobile stationapparatuses a1. The radio resources of the physical uplink controlchannel to transmit ACK/NACK are radio resources of the physical uplinkcontrol channel that corresponds to the control channel elementsallocated with the downlink grant indicating the allocation of the radioresources of the physical downlink shared channel that ACK/NACKcorresponds to in the frequency region and, in the time region, theradio resources are used after a predetermined time period elapses sincethe physical downlink shared channel is received. In the embodiment, theradio resources of ACK/NACK of the same uplink carrier component arecorrelated with the radio resources of the physical downlink controlchannel of the same downlink carrier component. The TPC command for thephysical uplink control channel included in the downlink grant is forthe uplink carrier component disposed with the radio resources ofACK/NACK that the downlink grant corresponds to.

A signal allocated in the physical uplink shared channel will bedescribed next.

The signal (referred to as “data signal”) of data information (transportblock) that is the information other than the uplink control informationis allocated in the physical uplink shared channel. The radio resourcesof the physical uplink shared channel are allocated using the uplinkgrant and are allocated in a sub frame after a predetermined time periodelapses since the sub frame receives the uplink grant. In theembodiment, the mobile station apparatus a1 determines the uplinkcarrier component allocated with the physical uplink shared channelwhose allocation of the radio resources is indicated by the uplinkgrant, from the downlink carrier component that receives the uplinkgrant. The TPC command for the physical uplink shared channel and thesounding reference signal included in the uplink grant is for the uplinkcarrier component allocated with the physical uplink shared channelwhich the uplink grant corresponds to. However, the present inventiondoes not limit to the above, and the uplink carrier component allocatedwith the physical uplink shared channel may be identified based on theuplink grant.

<About Configuration of Base Station Apparatus b1>

FIG. 5 is a schematic block diagram of the configuration of the basestation apparatus b1 according to the embodiment. As depicted, the basestation apparatus b1 includes an upper layer processing portion b11, acontrol portion b12, a reception processing portion b13, a plurality ofreceiving antennas, a transmission processing portion b14, and aplurality of transmitting antennas. The upper layer processing portionb11 includes a radio resource control portion b111, a transmission powercontrol portion b112, and a storing portion b113. Though the receivingantennas and the transmitting antennas are separately configured in FIG.5, the antennas may be adapted to be commonly used by using a thyristor,etc., that achieves an action of switching signals between inputting andoutputting.

The upper layer processing portion b11 outputs to the transmissionprocessing portion b14 the data information for each downlink carriercomponent acquired from the upper node, etc. The upper layer processingportion b11 also executes processes for a packet data convergenceprotocol (PDCP) layer, a radio link control (RLC) layer, and a radioresource control (RRC) layer. The radio resource control portion bill ofthe upper layer processing portion b11 executes management of variouskinds of setting information, the communication state, the buffer state,etc., of each of the mobile station apparatuses a1. The transmissionpower control portion b112 of the upper layer processing portion b11executes management of the transmission power of the uplink of each ofthe mobile station apparatuses a1. The storing portion b113 of the upperlayer processing portion b11 has the various kinds of settinginformation stored therein for each of the mobile station apparatuses a1set by the radio resource control portion bill and the transmissionpower control portion b112.

In the above processes, the radio resource control portion b111 includedin the upper layer processing portion b11 allocates a plurality ofuplink carrier components and a plurality of downlink carrier componentsto the mobile station apparatus a1 according to the number of downlinkcarrier components and the number of uplink carrier components that thebase station apparatus b1 is able to use in the radio communication andthe number of downlink carrier components and the number of uplinkcarrier components that the mobile station apparatus a1 is able tosimultaneously transmit or receive. The radio resource control portionb111 also allocates the anchor downlink component carrier to transmitthe transmission power control format addressed to the mobile stationapparatus a1, to the mobile station apparatus a1 based on the number ofmobile station apparatuses a1 accommodated in the downlink carriercomponent and the channel quality information indicating the quality ofthe propagation path for the downlink carrier component received fromthe mobile station apparatus a1. The radio resource control portion b111allocates to the mobile station apparatus a1 the C-RNTI to identify themobile station apparatus a1 and the downlink control information, theTPC-PUCCH-RNTI, the TPC-PUSCH-RNTI to identify the transmission powercontrol format, and the number of the TPC command (field), and notifiesthe mobile station apparatus a1 of this allocation.

The radio resource control portion b111 selects a plurality of downlinkcarrier components and a plurality of uplink carrier components, andallocates the radio resources in each of the selected downlink carriercomponents and the selected uplink carrier components to the mobilestation apparatus a1 as the radio resources to be allocated with thedata information. The radio resource control portion b111 transmits thedownlink grant and the uplink grant that indicate the above allocationto the mobile station apparatus a1 through the transmission processingportion b14 as the downlink control information. The downlink grant andthe uplink grant are each added with a sequence acquired by executing anexclusive OR operation using the C-RNTI that are allocated to the mobilestation apparatus a1 that the downlink grant or the uplink grantcorresponds to and the cyclic redundancy check code.

The radio resource control portion b111 executes management, etc., ofthe various kinds of setting information, the communication state, andthe buffer state of each of the mobile station apparatuses a1. The radioresource control portion b111 produces information allocated in eachchannel of each downlink carrier component or acquires these from anupper node, and outputs these to the transmission processing portion b14for each downlink carrier component. For example, the radio resourcecontrol portion b111 produces the downlink control information andoutputs this information to the transmission processing portion b14.

The radio resource control portion b111 produces the control informationto execute control of the reception processing portion b13 and thetransmission processing portion b14 based on the uplink controlinformation (ACK/NACK, the channel quality information, the schedulingrequest, and the buffer state of the mobile station apparatus a1)notified of in the physical uplink control channel from the mobilestation apparatus a1 and the various kinds of setting information ofeach of the mobile station apparatuses a1 set by the radio resourcecontrol portion bill, and outputs the control information to the controlportion b12. For example, when the transmission processing portion b14allocates the transmission power control format, the radio resourcecontrol portion bill outputs the control information to the controlportion b12 such that the transmission power control format is allocatedin the common search space of the anchor downlink component carrierallocated to the mobile station apparatus a1 that corresponds to the TPCcommand included in the transmission power control format.

In the above processes, the transmission power control portion b112included in the upper layer processing portion b11 determines thetransmission power of the uplink channel for each uplink carriercomponent of each of the mobile station apparatuses a1 based on theinformation notified of from another base station apparatus b1, thereception power of the uplink channel received from the mobile stationapparatus a1 etc. The information notified of from the other basestation apparatus b1 is the information on the amount of interferencecaused by the mobile station apparatus a1 communicating with the basestation apparatus b1 to another base station apparatus b1 and the amountof interference that will be caused from now by the mobile stationapparatus a1 communicating with another base station apparatus b1 to thebase station apparatus b1. When the transmission power control portionb112 determines the transmission power of the uplink channel of eachuplink carrier component of each of the mobile station apparatuses a1,the transmission power control portion b112 determines the value of theTPC command to control the transmission power of each uplink carriercomponent and produces information on the TPC command.

The transmission power control portion b112 produces the transmissionpower control format by combining the TPC commands corresponding to themobile station apparatuses a1 allocated with the same anchor downlinkcomponent carriers and further allocated with the same TPC-PUCCH-RNTI orthe same TPC-PUSCH-RNTI and transmits the format to the mobile stationapparatus a1 through the transmission processing portion b14. When theuplink grant or the downlink grant is present, the transmission powercontrol portion b112 includes in the format the TPC command for theuplink carrier component that the uplink grant or the downlink grantcorresponds to and transmits the format to the mobile station apparatusa1 through the transmission processing portion b14. The transmissionpower control format is added with a sequence acquired by executing anexclusive OR operation using the TPC-PUCCH-RNTI or the TPC-PUSCH-RNTIthat are allocated to each of the plurality of mobile stationapparatuses a1 corresponding to the transmission power control format,and the cyclic redundancy check code. When the TPC commands included inthe transmission power control format is for the physical uplink controlchannel, the TPC-PUCCH-RNTI is used and, when these TPC commandscorresponds to the physical uplink shared channel, the TPC-PUSCH-RNTI isused.

The storing portion b113 of the upper layer processing portion b11 hasthe various kinds of setting information stored therein for each of themobile station apparatuses a1 set by the radio resource control portionb111 and the transmission power control portion b112. FIG. 6 is adiagram of an example of the various kinds of setting information storedby the storing portion b113 according to the embodiment. In FIG. 6, thesetting information is stored for each of N mobile station apparatusesa1 (A1, A2, . . . , AN) and such items are stored in the form of a tablethat are set by the radio resource control portion b111 and thetransmission power control portion b112 of the upper layer processingportion b11 for each of the mobile station apparatuses a1 as: the numberof the anchor downlink component carrier; the identifiers (hexadecimalnumbers) of the TPC-PUCCH-RNTI and the TPC-PUSCH-RNTI; the number of theTPC command included in the transmission power control format that theuplink carrier component of each of the mobile station apparatuses a1corresponds to for each TPC-PUCCH-RNTI and each TPC-PUSCH-RNTI; and thevalue of the transmission power currently instructed to each of themobile station apparatuses a1 using the TPC command. The cells (grids)are blank for the number of the TPC command and the transmission powerfor the uplink carrier component not allocated to the mobile stationapparatus a1.

In the embodiment, the base station apparatus b1 allocates the sameTPC-PUSCH-RNTI and the same TPC-PUCCH-RNTI to the mobile stationapparatus a1 to which the base station apparatus b1 allocates the sameanchor downlink component carrier, like the mobile station apparatusesA1 and AN of FIG. 6. By doing this, the base station apparatus b1 onlyhas to transmit using one downlink carrier component the transmissionpower control format that includes one TPC-PUCCH-RNTI and oneTPC-PUSCH-RNTI. When the number of mobile station apparatuses a1 towhich the same anchor downlink component carriers are allocated islarger than the number of TPC commands that are transmittable using thetransmission power control format, the base station apparatus b1 dividesthe mobile station apparatuses a1 allocated with same anchor downlinkcomponent carriers into a plurality of groups and allocates the sameTPC-PUCCH-RNTI and the same TPC-PUSCH-RNTI to each of the mobile stationapparatuses a1 in the same group.

The TPC-PUCCH-RNTIs and the TPC-PUSCH-RNTIs may each be same ordifferent, that are allocated to the mobile station apparatuses a1allocated with different anchor downlink component carriers. The basestation apparatus b1 allocates the same TPC-PUCCH-RNTIs or the sameTPC-PUSCH-RNTIs to the mobile station apparatuses a1 allocated with thedifferent anchor downlink component carriers, thereby, is able to reusethe TPC-PUCCH-RNTI and the TPC-PUSCH-RNTI for each downlink carriercomponent, and is able to reduce the resources for the identifier(information resources that is able to be indicated by the number ofbits used for the identifier).

The TPC-PUCCH-RNTIs and the TPC-PUSCH-RNTIs to be allocated to themobile station apparatuses a1 to which the base station apparatus b1allocates different anchor downlink component carriers, are adapted tobe always different from each other and, thereby, only one mobilestation apparatus group corresponds to one TPC-PUCCH-RNTI and oneTPC-PUSCH-RNTI. Therefore, the management of the identifier of the basestation apparatus b1 is easy and, therefore, the structure of the basestation apparatus b1 is able to be simplified.

In the embodiment, the same TPC command number is allocated regardlessof the number of bits of one TPC command included in the transmissionpower control format. However, a different TPC command number may beallocated to each number of bits of one TPC command included in thetransmission power control format.

The control portion b12 produces a control signal to execute control ofthe reception processing portion b13 and the transmission processingportion b14 based on the control information from the upper layerprocessing portion b11. The control portion b12 outputs the controlsignal produced to the reception processing portion b13 and thetransmission processing portion b14 and executes the control of thereception processing portion b13 and the transmission processing portionb14.

The reception processing portion b13 demodulates and decodes receptionsignals received from the mobile station apparatus a1 through thereceiving antennas, according to the control signal input thereinto fromthe control portion b12, and outputs the decoded information to theupper layer processing portion b11.

More specifically, the reception processing portion b13: converts intoan intermediate frequency (down-converts) the signal in each uplinkcarrier component received through each of the receiving antennas;removes unnecessary frequency components therefrom; controls theamplification level for each signal level to be properly maintained;orthogonally demodulates the signal based on an in-phase component andan orthogonal component of the signal received; and converts an analogsignal acquired by the orthogonal demodulation into a digital signal.The receiving portion removes a portion that corresponds to a guardinterval (GI) from the digital signal acquired by the conversion. Thereceiving portion applies fast Fourier transform (FFT) to the signalafter removal of the guard interval and, thereby, extracts a signal inthe frequency region.

The reception processing portion b13 separates the signal extracted foreach uplink carrier component into signals allocated in the physicaluplink control channel, the physical uplink shared channel, thedemodulation reference signal, and the sounding reference signal. Thephysical uplink control channel is code-multiplexed and, therefore, isseparated by executing de-spreading therefor. This separation isexecuted based on allocation information for the radio resources, thatthe base station apparatus b1 determines in advance and notifies each ofthe mobile station apparatuses a1 of. An estimated value of thepropagation path is acquired from the uplink reference signal separated,and compensation is executed of the propagation path for the physicaluplink control channel and the physical uplink shared channel.

The reception processing portion b13: applies inverse discrete Fouriertransform (IDFT) to the physical uplink shared channel; thereby,acquires modulation symbols; and demodulates the signals received foreach of the modulation symbols in the physical uplink control channeland the physical uplink shared channel using such a modulation schemethat is determined in advance or that is notified of in advance by thebase station apparatus b1 to each of the mobile station apparatuses a1using the uplink grant, as binary phase shift keying (BPSK), quadraturephase shift keying (QPSK), 16quadrature amplitude modulation (16QAM), or64quadrature amplitude modulation (64QAM).

The reception processing portion b13 decodes: the coded bits of thephysical uplink control channel and the physical uplink shared channeldemodulated, using a coding scheme determined in advance and at a codingrate determined in advance or notified of in advance by the base stationapparatus b1 to each of the mobile station apparatuses a1 using theuplink grant; and outputs the data information and the uplink controlinformation to the upper layer processing portion b11.

The reception processing portion b13 measures reception power of each ofthe uplink reference signal and the signals received in the physicaluplink shared channel that are received from each of the mobile stationapparatuses a1, measures the transmission quality of the channel of theuplink carrier component, and outputs the measurement results to theupper layer processing portion b11.

The transmission processing portion b14: produces a downlink referencesignal according to the control signal input thereinto from the controlportion b12, codes and modulates the data information and the downlinkcontrol information input thereinto from the upper layer processingportion b11, and allocates the modulation results in the physicaldownlink control channel and the physical downlink shared channel, andmultiplexes the allocated modulation results with the downlink referencesignal produced, and transmits the multiplexing results to the mobilestation apparatus a1 through the transmitting antennas.

More specifically, the transmission processing portion b14: codes thedownlink control information of each downlink carrier component and thedata information input thereinto from the upper layer processing portionb11 according to the control signal input thereinto from the controlportion b12 by applying turbo-coding, convolution-coding, block-coding,etc., and modulates the coded bits using a modulation scheme such asQPSK, 16QAM, or 64QAM. The transmission processing portion b14 producesas a downlink reference signal a sequence that is acquired under apredetermined rule based on a cell identifier to identify the basestation apparatus b1 and that the mobile station apparatus a1 is known,and multiplexes the physical downlink control channel, the physicaldownlink shared channel, and the downlink reference signal.

The transmission power control format is multiplexed in a common searchspace of the anchor downlink component carrier allocated to the mobilestation apparatus a1 that the TPC command included in the transmissionpower control format corresponds to. The downlink grant and the uplinkgrant are multiplexed in a common search space of the anchor downlinkcomponent carrier allocated to the mobile station apparatus a1 thatcorresponds to the downlink grant and the uplink grant, or in a userequipment-specific search space of each downlink carrier componentallocated to this mobile station apparatus a1.

The transmission processing portion b14: applies inverse fast FourierTransform (IFFT) to the modulation symbol multiplexed; modulates thetransform result in the OFDM scheme; adds a guard interval to the OFDMsymbol OFDM-modulated; produces a baseband digital signal; converts thebaseband digital signal into an analog signal; produces an in-phasecomponent and an orthogonal component of an intermediate frequency fromthe analog signal; removes unnecessary frequency components for theintermediate frequency band; converts into a signal of a high frequency(up-converts) the signal of the intermediate frequency; removesunnecessary frequency components therefrom; amplifies the power thereof;and transmits the signal by outputting the signal to the transmissionantennas.

<About Configuration of Mobile Station Apparatus a1>

FIG. 7 is a schematic block diagram of the configuration of the mobilestation apparatus a1 according to the embodiment. As depicted, themobile station apparatus a1 includes an upper layer processing portiona11, a control portion a12, a reception processing portion a13, aplurality of receiving antennas, a transmission processing portion a14,and a plurality of transmitting antennas. The upper layer processingportion a11 includes a radio resource control portion a111, atransmission power control portion a112, and a storing portion a113. Thetransmission processing portion a14 includes a power amplifying portiona141. Though the receiving antennas and the transmitting antennas areseparately configured in FIG. 7, the antennas may be adapted to becommonly used by using thyristor, etc., that achieves an action ofswitching signals between inputting and outputting.

The upper layer processing portion a11 outputs to the transmissionprocessing portion a144 the data information of each uplink carriercomponent produced in response to an operation of a user, etc. The upperlayer processing portion all executes processes for the packet dataconvergence protocol layer, the radio link control layer, and the radioresource control layer. The radio resource control portion a111 includedby the upper layer processing portion a11 executes management, etc., ofvarious kinds of setting information, the communication state, and thebuffer state of the mobile station apparatus a1. The transmission powercontrol portion a112 of the upper layer processing portion a11 executesmanagement of the transmission power of the uplink of the mobile stationapparatuses a1. The storing portion a113 of the upper layer processingportion a11 has the various kinds of setting information stored thereinfor the mobile station apparatuses a1 managed by the radio resourcecontrol portion a111.

In the above processes, the radio resource control portion a111 includedby the upper layer processing portion a11 manages the various kinds ofsetting information for the downlink carrier components and the uplinkcarrier components, the anchor downlink component carrier, the C-RNTI,the TRC-PUCCH-RNTI, the TPC-PUSCH-RNTI, etc., allocated to the mobilestation apparatus a1. The radio resource control portion a111 alsoproduces information to be allocated in each channel of each uplinkcarrier component and outputs the information to the transmissionprocessing portion a14 for each uplink carrier component. For example,the radio resource control portion a111 produces ACK/NACK for the datainformation of the physical downlink shared channel according to theresult of the HARQ process and outputs the ACK/NACK produced to thetransmission processing portion a14.

The radio resource control portion a111: produces the controlinformation to execute control of the reception processing portion a13and the transmission processing portion a14 based on the downlinkcontrol information notified of from the base station apparatus b1through the physical downlink control channel (for example, the downlinkgrant and the uplink grant) and the various kinds of setting informationfor the mobile station apparatus a1 managed by the radio resourcecontrol portion a111; and outputs the control information to the controlportion a12. For example, when the reception processing portion a13monitors the physical downlink control channel, the radio resourcecontrol portion a111 outputs the control information to the controlportion alt to monitor the transmission power control format in thecommon search space of the anchor downlink component carrier, andmonitor the downlink grant and the uplink grant addressed to the mobilestation apparatus a1 in the common search space of the anchor downlinkcomponent carrier and user equipment-specific search space of eachdownlink carrier component.

In the above processes, the transmission power control portion a112included by the upper layer processing portion a11 executes the controlof the transmission power of the uplink channels based on the TPCcommand notified of from the base station apparatus b1, the path lossmeasured by the mobile station apparatus a1 from the downlink referencesignal, etc., and produces the control information to execute control ofthe power amplifying portion a141, and outputs the control informationto the control portion a12.

The storing portion a113 of the upper layer processing portion a11 hasvarious kinds of setting information stored therein of the mobilestation apparatus a1 managed by the radio resource control portion a111and the transmission power control portion a112. FIG. 8 is a diagram ofan example of the various kinds of setting information stored in thestoring portion a113 according to the embodiment. In FIG. 8, such itemsare stored in the form of a table as the number of the anchor downlinkcomponent carrier set in the mobile station apparatus a1 by the basestation apparatus b1, and the identifiers (hexadecimal numbers) of theTPC-PUCCH-RNTI and the TPC-PUSCH-RNTI, and the number of each TPCcommand included in the transmission power control format that theuplink carrier component of the mobile station apparatuses a1corresponds to for each TPC-PUCCH-RNTI and each TPC-PUSCH-RNTI, and thevalue of the transmission power currently instructed to the mobilestation apparatuses a1 using the TPC command.

When the mobile station apparatus a1 simultaneously receives the TPCcommand of the transmission power control format that includes theTPC-PUCCH-RNTI and the TPC command of the downlink grant, the uplinkcarrier component that the TPC command of the downlink grant correspondsto is applied with the TPC command of the downlink grant and the uplinkcarrier component that no TPC command of the downlink grant correspondsto is applied with the TPC command of the format 3/3A. When the mobilestation apparatus a1 simultaneously receives the TPC command of thetransmission power control format that includes the TPC-PUSCH-RNTI andthe TPC command of the uplink grant, the uplink carrier component thatthe TPC command of the uplink grant corresponds to is applied with theTPC command of the uplink grant and the uplink carrier component that noTPC command of the uplink grant corresponds to is applied with the TPCcommand of the format 3/3A.

FIG. 9 is a diagram of an example of the configuration of thetransmission power control format according to the embodiment. In FIG.9, the transmission power control format includes M TPC commands(squares each added with “TPC #i”; “i” is an integer) and a square withslant lines therein represents a sequence acquired by executing anexclusive OR operation using the cyclic redundancy check code producedfrom the M TPC commands and the TPC-PUCCH-RNTI (or TPC-PUSCH-RNTI).

For example, when the mobile station apparatus a1 having the settinginformation like that of FIG. 8 detects the transmission power controlformat in the common search space of the downlink carrier component ofDCC-2 that is the anchor downlink component carrier, using an identifier“0001” that is the TPC-PUCCH-RNTI allocated to the mobile stationapparatus a1, the mobile station apparatus a1 determines the second TPCcommand of the transmission power control format detected to be the TPCcommand for the uplink carrier component of UCC-1, the third TPC commandthereof to be the TPC command for the uplink carrier component of UCC-2,and the fourth TPC command thereof to be the TPC command for the uplinkcarrier component of UCC-3; and updates the value of the transmissionpower instructed by the TPC command in the storing portion a113 of theupper layer processing portion a11.

The control portion a12 produces a control signal to execute the controlof the reception processing portion a13 and the transmission processingportion a14 based on the control information from the upper layerprocessing portion a11. The control portion a12 outputs the controlsignal produced to the reception processing portion a13 and thetransmission processing portion a14 and executes the control for thereception processing portion a13 and the transmission processing portiona14.

The reception processing portion a13 demodulates and decodes thereception signals received from the base station apparatus b1 throughthe receiving antennas according to the control signal input thereintofrom the control portion a12, and outputs the information decoded to theupper layer processing portion a11. The reception processing portion a13produces the channel quality information based on the reception qualityof the downlink reference signal detected, etc., and outputs the channelquality information to the transmission processing portion a14.

More specifically, the reception processing portion a13: converts intoan intermediate frequency (down-converts) the signal in each uplinkcarrier component received through each of the receiving antennas;removes unnecessary frequency components therefrom; controls theamplification level for each signal level to be properly maintained;orthogonally demodulates the signal based on an in-phase component andan orthogonal component of the signal received; and converts each analogsignal acquired by the orthogonal demodulation into a digital signal.The receiving portion a13 removes a portion that corresponds to a guardinterval from the digital signal acquired by the conversion. Thereceiving portion a13 applies fast Fourier transform to the signal afterremoval of the guard interval and, thereby, extracts a signal in thefrequency region.

The reception processing portion a13 separates the signal extracted foreach downlink carrier component into signals allocated in the physicaldownlink control channel, the physical downlink shared channel, and thedownlink reference signal. This separation is executed based on theallocation information on the radio resources notified of using thedownlink grant. The reception processing portion a13 acquires anestimated value of each propagation path from the downlink referencesignal separated and compensates the propagation paths of the physicaldownlink control channel and the physical downlink shared channel. Thereception processing portion a13 produces the channel qualityinformation based on the reception quality of the downlink referencesignal separated, etc., and outputs the channel quality information tothe transmission processing portion a14.

The reception processing portion a13: executes demodulation in the QPSKdemodulation scheme for the downlink control channel; monitors thetransmission power control format in the common search space of theanchor downlink component carrier and monitors the downlink grant andthe uplink grant in the user equipment-specific search space of each ofthe downlink carrier components set and in the common search space ofthe anchor downlink component carrier; and tries demodulating the above.When the reception processing portion a13 successfully executes thedemodulation of the physical downlink control channel, the receptionprocessing portion a13 outputs the downlink control informationdemodulated to the upper layer processing portion a11.

The reception processing portion a13 executes demodulation for thephysical downlink shared channel in the modulation scheme notified ofusing the downlink grant such as QPSK, 16QAM, or 64QAM, executesdecoding for the coding rate notified of using the downlink grant, andoutputs the data information to the upper layer processing portion a11.

The transmission processing portion a14: produces the uplink referencesignal according to the control signal input thereinto from the controlportion a12; codes and modulates the data information and ACK/NACK inputthereinto from the upper layer processing portion a11 and the channelquality information input thereinto from the reception processingportion a13; disposes the modulation results in the physical uplinkshared channel and the physical uplink control channel; multiplexes thedisposed modulation results with the uplink reference signal produced;and transmits the multiplexing results to the base station apparatus b1through the transmitting antennas.

More specifically, the transmission processing portion a14: codes theuplink control information of each uplink carrier component and the datainformation input thereinto from the upper layer processing portion a11and the reception processing portion a13 according to the control signalinput thereinto from the control portion a12 by applying turbo-coding,convolution-coding, block-coding, etc.; and modulates the coded bitsusing a modulation scheme such as BPSK, QPSK, 16QAM, or 64QAM.

The transmission processing portion a14 produces as an uplink referencesignal a sequence that the base station apparatus b1 is known and thatis acquired under a predetermined rule based on a cell identifier toidentify the base station apparatus b1, etc. The transmission processingportion a14 diffuses using a code the modulation symbols of the physicaluplink control channel, applies discrete Fourier transform (DFT) to thediffused modulation symbols after re-arranges the modulation symbols inparallel to each other, and multiplexes the transform result with theuplink reference signal produced.

The transmission processing portion a14 applies inverse fast Fouriertransform to the signal multiplexed modulates the transform result inthe SC-FDMA scheme; adds the guard interval to the SC-FDMA symbolSC-FDMA-modulated; produces a baseband digital signal converts thebaseband digital signal into an analog signal produces an in-phasecomponent and an orthogonal component of an intermediate frequency fromthe analog signal removes unnecessary frequency components for theintermediate frequency band therefrom; converts into a signal of a highfrequency (up-converts) the signal of the intermediate frequency removesunnecessary frequency components therefrom amplifies the power of thesignal and transmits the signal by outputting the signal to thetransmission antennas.

In the above processes, the power amplifying portion a141 amplifies thetransmission power of each of the physical uplink control channel, thephysical uplink shared channel, and the sounding reference signalaccording to the control signal input thereinto from the control portionalt. The transmission power of the demodulation reference signal isamplified to the same value as that of the transmission power of thechannel with which the demodulation reference signal istime-multiplexed.

<About Operations of Radio Communication System>

Operations of the radio communication system will be described.

FIG. 10 is a diagram of a method of applying the TPC command to thephysical uplink shared channel of the mobile station apparatus a1according to the embodiment. FIG. 10 depicts the case where the mobilestation apparatus a1 is allocated with the downlink carrier components(DCC-1, DCC-2, and DCC-3) and the uplink carrier components (UCC-1,UCC-2, and UCC-3) as depicted in FIG. 2 and DCC-2 is set as the anchordownlink component carrier.

In FIG. 10 the axis of abscissa represents the time region; squaresadded therein with slant grid lines represent a transmission powercontrol format including the TPC-PUSCH-RNTI allocated to the mobilestation apparatus a1; squares added therein with longitudinal andlateral grid lines represent an uplink grant; squares added therein withslant lines represent the physical uplink shared channel; squares addedtherein with dots each represent the sounding reference signal; andthick arrows represent the transmission power control format, the uplinkcarrier component that the TPC command for the physical uplink sharedchannel and the sounding reference signal included in the uplink grantcorrespond to, and the time point at which the TPC command is appliedwith.

In FIG. 10 the TPC command included in the uplink grant received usingDCC-1 is for UCC-1; the TPC command included in the uplink grantreceived using DCC-2 is for the uplink grant for UCC-2; the TPC commandincluded in the uplink grant received using DCC-3 is for UCC-3; and thetransmission power control format received in the common search space ofDCC-2 includes the TPC commands for UCC-1, UCC-2, and UCC-3.

The sounding reference signal is allocated with cyclic radio resourcesfor each uplink carrier component. The information and the TPC commandconcerning the physical uplink shared channel of the uplink grantreceived using each of the downlink carrier components DCC-i (i=1, 2,and 3) are for each of the uplink carrier components UCC-i (i=1, 2, and3) four sub frames after the reception of the uplink grant. The TPCcommand of the transmission power control format received in the commonsearch space of the anchor downlink component carrier DCC-2 is for eachof the uplink carrier components four sub frames after the reception ofthe transmission power control format.

When the mobile station apparatus a1 simultaneously receives the TPCcommand of the uplink grant and the TPC command of the transmissionpower control format for the same uplink carrier component like the subframe of the uplink carrier component UCC-1 surrounded by a thick linecircle of FIG. 10, the mobile station apparatus a1 applies the TPCcommand of the uplink grant with priority. The mobile station apparatusa1 determines in advance which of the TPC commands of the uplink grantand the transmission power control format is selected and, thereby, theoperations are able to be clarified that are executed when mobilestation apparatus a1 receives the TPC commands that are differentbetween the uplink grant and the transmission power control format. Thebase station apparatus b1 detects whether the mobile station apparatusa1 transmits the physical uplink shared channel that the uplink grantcorresponds to thereby, is able to grasp whether the mobile stationapparatus a1 accurately receives the uplink grant and accurately appliesthe TPC command and, therefore, is able to execute more accurate controlof the transmission power by selecting the TPC command of the uplinkgrant with priority. The same holds for the transmission power controlformat including the TPC-PUCCH-RNTI and the TPC command included in thedownlink grant, and the mobile station apparatus a1 selects withpriority the TPC command of the downlink grant.

FIG. 11 is a flowchart of an example of operations of the base stationapparatus b1 according to the embodiment.

(Step S100) The base station apparatus b1 allocates to the mobilestation apparatus a1 a plurality of uplink carrier components and aplurality of downlink carrier components according to the number ofdownlink carrier components and the number of uplink carrier componentsthat are available for the base station apparatus b1 in the radiocommunication and the number of downlink carrier components and thenumber of uplink carrier components that the mobile station apparatus a1is able to simultaneously transmit or receive etc. The procedureadvances to step S101.

(Step S101) The base station apparatus b1 allocates the anchor downlinkcomponent carrier that transmits the transmission power control formataddressed to the mobile station apparatus to the mobile stationapparatus a1 based on the number of mobile station apparatuses a1accommodated in the downlink carrier component and the channel qualityinformation indicating the quality of the propagation path for thedownlink carrier component received from the mobile station apparatusa1. The procedure advances to step S102.

(Step S102) The base station apparatus b1 allocates to the mobilestation apparatus a1 the identifiers (TPC-PUCCH-RNTI and TPC-PUSCH-RNTI)to identify the transmission power control format and the channel thatthe TPC command included in the transmission power control formatcorresponds to and numbers to identify a plurality of TPC commands forthe uplink carrier components allocated to the mobile station apparatusa1 included in the transmission power control format. The base stationapparatus b1 divides the mobile station apparatuses a1 into a pluralityof groups each including the mobile station apparatuses a1 allocatedwith same anchor downlink component carriers, and allocates the sameTPC-PUCCH-RNTI and the same TPC-PUSCH-RNTI to each of the mobile stationapparatuses a1 in the same group. The procedure advances to step S103.

(Step S103) The base station apparatus b1 determines the transmissionpower of the channel of the mobile station apparatus a1 based on theamount of interference caused by the mobile station apparatus a1communicating with the base station apparatus b1 to another base stationapparatus b1, that is notified of from the other base station apparatusb1; and the reception power of the uplink channel received from themobile station apparatus a1, etc. The procedure advances to step S104.

(Step S104) The base station apparatus b1 produces a TPC command to benotified of to the mobile station apparatus a1 such that thetransmission power of each uplink channel is the transmission powerdetermined at step S103. The procedure advances to step S105.

(Step S105) The base station apparatus b1 produces the transmissionpower control format from the TPC command for each of the mobile stationapparatuses a1 each allocated with the same identifier, of the pluralityof TPC commands produced at step S104. When the uplink grant or thedownlink grant is present, the TPC command is included in the uplinkgrant or the downlink grant. The procedure advances to step S106.

(Step S106) The base station apparatus b1 codes and modulates thedownlink control information (the transmission power control format, thedownlink grant, and the uplink grant) and transmits the modulationresults using the physical downlink control channel. The transmissionpower control format is allocated in the common search space of theanchor downlink component carrier allocated to each of the mobilestation apparatuses a1 at step S101. The downlink grant and the uplinkgrant are allocated in the common search space of the anchor downlinkcomponent carrier or the user equipment-specific search space of eachdownlink carrier component.

After step S106, the base station apparatus b1 causes the processconcerning the transmission power control of each of the uplink channelsto come to an end.

FIG. 12 is a flowchart of an example of operations of the mobile stationapparatus a1 according to the embodiment. (Step S200) The mobile stationapparatus a1 is allocated with a plurality of uplink carrier componentsand a plurality of downlink carrier components to be used in the radiocommunication, from the base station apparatus b1. The procedureadvances to step S201. (Step S201) The mobile station apparatus a1 isallocated from the base station apparatus b1 with the anchor downlinkcomponent carrier with which the transmission power control formataddressed to the mobile station apparatus a1 is transmitted. Theprocedure advances to step S202.

(Step S202) The mobile station apparatus a1 is allocated by the basestation apparatus b1 with the identifiers (the TPC-PUCCH-RNTI and theTPC-PUSCH-RNTI) to identify the transmission power control format andthe channel that the TPC command included in the transmission powercontrol format corresponds to and numbers to identify the plurality ofTPC commands for the uplink carrier components allocated to the mobilestation apparatus a1 included in the transmission power control format.The procedure advances to step S203.

(Step S203) The mobile station apparatus a1 monitors the transmissionpower control format using the TPC-PUCCH-RNTI and the TPC-PUSCH-RNTI inthe common search space of the anchor downlink component carrier, andthe downlink grant and the uplink grant using the C-RNTI in the commonsearch space of the anchor downlink component carrier and in the userequipment-specific search space of each of the downlink carriercomponents, and tries demodulating and decoding the above. The procedureadvances to step S204.

(Step S204) When the mobile station apparatus a1 successfully executesthe demodulation of the transmission power control format, the downlinkgrant, or the uplink grant at step S203, the mobile station apparatus a1updates the value of the TPC command for each of the uplink carriercomponents stored by the mobile station apparatus a1 using the TPCcommand included in the transmission power control format, the downlinkgrant, or the uplink grant. The procedure advances to step S205.

(Step S205) The mobile station apparatus a1 applies the value of the TPCcommand updated at step S204 to the channel of the uplink sub frameafter a time period determined in advance elapses, and transmits theuplink channel.

After step S205, the mobile station apparatus a1 causes the processconcerning the transmission power control of each of the uplink channelsto come to an end.

As above, according to the embodiment, in the radio communication systemthe base station apparatus b1 allocates the plurality of uplink carriercomponents and the plurality of downlink carrier components to themobile station apparatus a1, sets the anchor downlink component carrierin the mobile station apparatus a1, notifies the mobile stationapparatus a1 of the anchor downlink component carrier set, collectivelyincludes the plurality of TPC commands for each of the uplink carriercomponents of the mobile station apparatus a1 in one piece of downlinkcontrol information, and transmits the downlink control information thatincludes the TPC commands for the plurality of uplink carrier componentsusing the anchor downlink component carrier set and the mobile stationapparatus a1 monitors the downlink control information that includes theTPC commands for each of the uplink carrier components of the mobilestation apparatus a1 using only the anchor downlink component carrierset. Thereby, in the radio communication system, the base stationapparatus b1 can use only one piece of downlink control information totransmit the TPC commands of each of the uplink carrier components tothe mobile station apparatus a1 and, therefore, the overhead of thedownlink control information is able to be reduced.

In the embodiment, in the radio communication system, the mobile stationapparatus a1 can monitor the downlink control information using only onedownlink carrier component and, therefore, the load of the processesexecuted when the downlink control information of the mobile stationapparatus a1 is monitored.

First Reference Example

A first reference example of the present invention will now be describedin detail with reference to the accompanying drawings.

In the embodiment, the radio communication system has been described forthe case where the base station apparatus b1 sets as the anchor downlinkcomponent carrier the one downlink carrier component of the plurality ofdownlink carrier components allocated by the base station apparatus b1to the mobile station apparatus a1 and transmits the transmission powercontrol format using the one anchor downlink component carrier set. Inthe reference example, the case will be described where a base stationapparatus divides a plurality of uplink carrier components allocated toa mobile station apparatus into a plurality of (L) groups and sets adownlink carrier component as the anchor downlink component carrier foreach of the uplink carrier component groups and transmits thetransmission power control format using the one or more anchor downlinkcomponent carrier(s) set.

Comparing the radio communication system according to the referenceexample with the radio communication system according to the embodiment,an upper layer processing portion of the mobile station apparatus and anupper layer processing portion of the base station apparatus differbetween the radio communication systems. However, the configuration andthe functions that the other components have are the same as those ofthe first embodiment. Therefore, the same functions as those of thefirst embodiment will not again be described. A mobile station apparatusaccording to the embodiment will be referred to as “mobile stationapparatus a2” and a base station apparatus according thereto will bereferred to as “base station apparatus b2”.

FIG. 13 is a schematic block diagram of the configuration of the basestation apparatus b2 according to the first reference example of thepresent invention. Comparing an upper layer processing portion b21according to the reference example (FIG. 13) with the upper layerprocessing portion b11 according to the embodiment (FIG. 5), a radioresource control portion b211, a transmission power control portionb212, and a storing portion b213 are different between the upper layerprocessing portions b21 and b11. However, the functions that the othercomponents (the control portion b12, the reception processing portionb13, and the transmission processing portion b14) have are the same asthose of the embodiment. The same functions as those of the embodimentwill not again be described.

Processes of the upper layer processing portion b21 of the base stationapparatus b2 will be described below.

In the reference example, the upper layer processing portion b21 outputsdata information of each downlink carrier component to the transmissionprocessing portion b14. The upper layer processing portion b21 executesprocesses for the packet data convergence protocol layer, the radio linkcontrol layer, and the radio resource control layer. The radio resourcecontrol portion b211 of the upper layer processing portion b21 executesmanagement, etc., of various kinds of setting information, thecommunication state, and the buffer state of each of the mobile stationapparatuses a2. The transmission power control portion b212 of the upperlayer processing portion b21 executes management of the uplinktransmission power of each of the mobile station apparatuses a2. Thestoring portion b213 of the upper layer processing portion b21 has thevarious kinds of setting information stored therein for each of themobile station apparatuses a2 set by the radio resource control portionb211 and the transmission power control portion b212.

In the above processes, the radio resource control portion b211 includedby the upper layer processing portion b21 allocates a plurality ofuplink carrier components and a plurality of downlink carrier componentsto the mobile station apparatus a2 according to the number of downlinkcarrier components and the number of uplink carrier components that thebase station apparatus b2 is able to use in the radio communication, andthe number of downlink carrier components and the number of uplinkcarrier components that the mobile station apparatus a2 is able tosimultaneously transmit or receive. The radio resource control portionb211 divides the uplink carrier components into a plurality of groupsbased on the frequency band (for example, 800 MHz or 3 GHz) and thecoverage of the uplink carrier component managed by the base stationapparatus b2, and interference from an adjacent base station apparatusb2, etc., and notifies each of the mobile station apparatuses a2 of thegroup configuration of the uplink carrier components.

The radio resource control portion b211 allocates to each of the mobilestation apparatuses a2 the anchor downlink component carrier to transmitthe transmission power control format addressed to the mobile stationapparatus a2, for each of the uplink carrier component groups, based onthe number of mobile station apparatuses a2 accommodated in the downlinkcarrier component, the channel quality information indicating thequality of the propagation path for the downlink carrier componentsreceived from the mobile station apparatus a2, the frequency band andthe coverage of the uplink carrier component, interference from anadjacent base station apparatus b2, etc. The radio resource controlportion b211 allocates to each of the mobile station apparatuses a2 theC-RNTI to identify the downlink control information addressed to themobile station apparatus a2, the TPC-PUCCH-RNTI to identify thetransmission power control format for each anchor downlink componentcarrier, the TPC-PUSCH-RNTI, and the number of the TPC command, andnotifies each of the mobile station apparatuses a2 of the allocation.

The radio resource control portion b211 may always allocate a differentdownlink carrier component as the anchor downlink component carrier tobe allocated to each of the uplink carrier component groups, or mayallocate same downlink carrier components to the plurality of uplinkcarrier component groups as the anchor downlink carrier components.

When the anchor downlink component carrier allocated to each of theuplink carrier component groups differs from each other, the radioresource control portion b211 may use same TPC-PUCCH-RNTIs and sameTPC-PUSCH-RNTIs for a plurality of anchor downlink component carriers.Thereby, the mobile station apparatus a2 is able to identify the uplinkcarrier component group that the transmission power control formatcorresponds to, from the anchor downlink component carrier from whichthe transmission power control format including the TPC-PUCCH-RNTI orthe TPC-PUSCH-RNTI is detected. The radio resource control portion b211is able to reduce the resources for the identifiers by reusing, for eachof the uplink carrier component groups, the resources for theidentifiers to be allocated to the TPC-PUCCH-RNTI and theTPC-PUSCH-RNTI.

When the anchor downlink component carrier to be allocated to each ofthe uplink carrier component groups differs from each other, the radioresource control portion b211 may allocate to each of the uplink carriercomponent groups, the TPC-PUCCH-RNTI and the TPC-PUSCH-RNTI that alwaysdiffer from each other among the groups. Thereby, the base stationapparatus b2 can only manage the TPC-PUCCH-RNTIs and the TPC-PUSCH-RNTIsfor the whole uplink carrier component groups and, therefore, thestructure of the base station apparatus b2 is able to be simplified.

When the radio resource control portion b211 allocates same downlinkcarrier components to the plurality of uplink carrier component groupsas the anchor downlink component carrier, the radio resource controlportion b211 may allocate a different TPC-PUCCH-RNTI and a differentTPC-PUSCH-RNTI for each of the uplink carrier component groups. Thereby,the mobile station apparatus a2 is able to identify the uplink carriercomponent group that the transmission power control format correspondsto, from the TPC-PUCCH-RNTI or the TPC-PUSCH-RNTI included in thetransmission power control format detected and, thereby, is able toreduce the number of downlink carrier components for the mobile stationapparatus a2 to monitor the common search space.

The radio resource control portion b211 produces the control informationto execute the control of the reception processing portion b13 and thetransmission processing portion b14 based on the uplink controlinformation (ACK/NACK, the channel quality information, the schedulingrequest, and the buffer state of the mobile station apparatus a2)notified of using the physical uplink control channel from the mobilestation apparatus a2 and the various kinds of setting information foreach of the mobile station apparatuses a2 set by the radio resourcecontrol portion b211, and the radio resource control portion b211outputs the control information to the control portion b12. For example,when the transmission processing portion b14 allocates the transmissionpower control format, the radio resource control portion outputs thecontrol information to the control portion b12 such that thetransmission power control format is allocated in the common searchspace of the anchor downlink component carrier allocated to the uplinkcarrier component group that the transmission power control formatcorresponds to.

In the above processes, the transmission power control portion b212included in the upper layer processing portion b21 produces thetransmission power control format by combining the TPC commands for theuplink carrier component group of the mobile station apparatuses a2allocated with the same TPC-PUCCH-RNTIs or the same TPC-PUSCH-RNTIs forthe same anchor downlink component carrier.

The storing portion b213 of the upper layer processing portion b21 hasthe various kinds of setting information stored therein for each of themobile station apparatuses a2 set by the radio resource control portionb211 and the transmission power control portion b212. FIG. 14 is adiagram of an example of the various kinds of setting information storedby the storing portion b213 according to the reference example. In FIG.13, the pieces of setting information are stored for each of N mobilestation apparatuses a2 (A1, A2, . . . , AN) and the uplink carriercomponents are divided into a group including UCC-1 and UCC-2 andanother group including UCC-3 and UCC-4.

For example, in FIG. 14, the storing portion b213 has such items storedtherein as the various kinds of setting information set by the radioresource control portion b211 and the transmission power control portionb212 for the group including UCC-1 and UCC-2 of the mobile stationapparatus A1, “DCC-2” as the anchor downlink component carrier, “0001”as the TPC-PUCCH-RNTI, “2” as the number of the TPC command for thephysical uplink control channel for UCC-1, “0 dBm” as the value of theTPC command for the physical uplink control channel of UCC-1, “3” as thenumber of the TPC command for the physical uplink control channel forUCC-2, “4 dBm” as the value of the TPC command for the physical uplinkcontrol channel of UCC-2, “0002” as the TPC-PUSCH-RNTI, “4” as thenumber of the TPC command for the physical uplink shared channel forUCC-1, “0 dBm” as the value of the TPC command for the physical uplinkshared channel of UCC-1, “1” as the number of the TPC command for thephysical uplink control channel for UCC-2, and “1 dBm” as the value ofthe TPC command for the physical uplink shared channel of UCC-2.

Such items are also stored in the form of a table as the number of theanchor downlink component carrier set by the radio resource controlportion b211 and the transmission power control portion b212 of theupper layer processing portion b21 in each of the mobile stationapparatuses a2 for each of the uplink carrier component groups, and theidentifiers (hexadecimal numbers) of the TPC-PUCCH-RNTI and theTPC-PUSCH-RNTI, and the number of each TPC command included in thetransmission power control format that the uplink carrier component ofeach of the mobile station apparatuses a2 corresponds to for eachTPC-PUCCH-RNTI and each TPC-PUSCH-RNTI, and the value of thetransmission power currently instructed to each of the mobile stationapparatuses a2 using the TPC command. In FIG. 14, the cells (grids) areblank for the number of the TPC command for the uplink carrier componentnot allocated to the mobile station apparatus a2 by the base stationapparatus b2, and the transmission power therefor.

FIG. 15 is a schematic block diagram of the configuration of the mobilestation apparatus a2 according to the first reference example of thepresent invention. Comparing an upper layer processing portion a21according to the reference example (FIG. 15) with the upper layerprocessing portion a11 according to the embodiment (FIG. 7), a radioresource control portion a211 and a storing portion a213 are differentbetween the embodiments. However, the functions that the othercomponents (the transmission power control portion a112, the controlportion a12, the reception processing portion a13, and the transmissionprocessing portion a14) have are same as those of the embodiment.Therefore, the same functions as those of the embodiment will not againbe described.

Processes of the upper layer processing portion a21 of the mobilestation apparatus a2 will be described below.

In the reference example, the upper layer processing portion a21 outputsto the transmission processing portion a14 the data information for eachuplink carrier component produced in response to an operation of a user,etc. The upper layer processing portion a21 executes processes for thepacket data convergence protocol layer, the radio link control layer,and the radio resource control layer. The radio resource control portiona211 included in the upper layer processing portion a21 executesmanagement of various kinds of setting information, the communicationstate, and the buffer state of the mobile station apparatus a2, etc. Thestoring portion a213 of the upper layer processing portion a21 has thevarious kinds of setting information stored therein of the mobilestation apparatus a2 managed by the radio resource control portion e21.

In the above processes, the radio resource control portion a211 includedin the upper layer processing portion a21 manages the various kinds ofsetting information such as the C-RNTI allocated to the mobile stationapparatus a2, the downlink carrier components and the uplink carriercomponents, the group configuration of the uplink carrier componentsset, and the anchor downlink component carrier, the TPC-PUCCH-RNTI, andthe TPC-PUSCH-RNTI of each of the uplink carrier component groups. Theradio resource control portion a211 produces information to be allocatedin each channel of each uplink carrier component and outputs theinformation to the transmission processing portion a14 for each uplinkcarrier component.

The radio resource control portion a211 produces the control informationto execute the control of the reception processing portion a13 and thetransmission processing portion a14 based on the downlink controlinformation (for example, the downlink grant and the uplink grant)notified of in the physical downlink control channel from the basestation apparatus b2 and the various kinds of setting information of themobile station apparatus a2 managed by the radio resource controlportion a211 and outputs the control information to the control portiona12. For example, when the reception processing portion a13 monitors thephysical downlink control channel, the radio resource control portiona211 outputs the control information to the control portion a12 suchthat the reception processing portion a13 monitors the transmissionpower control format in the common search space of the anchor downlinkcomponent carrier for each of the uplink carrier component groups andmonitors the downlink grant and the uplink grant addressed to the mobilestation apparatus a2 in the common search space of the anchor downlinkcomponent carrier and in the user equipment-specific search space ofeach downlink carrier component.

The storing portion a213 of the upper layer processing portion a21 hasthe various kinds of setting information of the mobile station apparatusa2 managed by the radio resource control portion a211 and thetransmission power control portion a112. FIG. 16 is a diagram of anexample of the various kinds of setting information stored by thestoring portion a213 according to the embodiment. In FIG. 16, such itemsare stored in the form of a table as the number of the anchor downlinkcomponent carrier set by the base station apparatus b2 for each of theuplink carrier component groups (the group including UCC-1 and UCC-2 andthe group including UCC-3 and UCC-4) in the mobile station apparatus a2,and the identifiers (hexadecimal numbers) of the TPC-PUCCH-RNTI and theTPC-PUSCH-RNTI, and, for each TPC-PUCCH-RNTI and each TPC-PUSCH-RNTI,the number of the TPC command included in the transmission power controlformat that the uplink carrier component of the mobile stationapparatuses a2 corresponds to and the value of the transmission powercurrently instructed to the mobile station apparatuses a2 using the TPCcommand.

For example, in FIG. 16, the storing portion a213 has such items storedtherein as the various kinds of setting information set by the basestation apparatus b2 for the group including UCC-1 and UCC-2 in themobile station apparatus a2, “DCC-2” as the anchor downlink componentcarrier, “0001” as the TPC-PUCCH-RNTI, “2” as the number of the TPCcommand for the physical uplink control channel for UCC-1, “0 dBm” asthe value of the TPC command for the physical uplink control channel ofUCC-1, “3” as the number of the TPC command for the physical uplinkcontrol channel for UCC-2, “4 dBm” as the value of the TPC command forthe physical uplink control channel of UCC-2, “0002” as theTPC-PUSCH-RNTI, “4” as the number of the TPC command for the physicaluplink shared channel for UCC-1, “0 dBm” as the value of the TPC commandfor the physical uplink shared channel of UCC-1, “1” as the number ofthe TPC command for the physical uplink control channel for UCC-2, and“1 dBm” as the value of the TPC command for the physical uplink sharedchannel of UCC-2.

FIG. 17 is a diagram of a method of applying the TPC command to thephysical uplink shared channel of the mobile station apparatus a2according to the embodiment. FIG. 17 depicts the case where the mobilestation apparatus a2 is allocated with the four downlink carriercomponents (DCC-1, DCC-2, DCC-3, and DCC-4) and the four uplink carriercomponents (UCC-1, UCC-2, UCC-3, and UCC-4), and DCC-2 is set as theanchor downlink component carrier for the group including UCC-1 andUCC-2, and DCC-3 is set as the anchor downlink component carrier for thegroup including UCC-3 and UCC-4.

In FIG. 17, the axis of abscissa represents the time region, squaresadded therein with slant grid lines represent a transmission powercontrol format including the TPC-PUSCH-RNTI allocated to the mobilestation apparatus a2, squares added therein with longitudinal andlateral grid lines represent an uplink grant squares added therein withslant lines represent the physical uplink shared channel, squares addedtherein with dots represent the sounding reference signal, and thickarrows indicate the transmission power control format, the uplinkcarrier component that the TPC command for the physical uplink sharedchannel and the sounding reference signal included in the uplink grantcorrespond to, and the time point at which the TPC command is appliedwith.

In FIG. 17, the TPC command included in the uplink grant received usingDCC-1 is for UCC-1, the TPC command included in the uplink grantreceived using DCC-2 is for the uplink grant for UCC-2, the TPC commandincluded in the uplink grant received using DCC-3 is for UCC-3, thetransmission power control format received in the common search space ofDCC-2 includes the TPC commands for UCC-1 and UCC-2, and thetransmission power control format received in the common search space ofDCC-3 includes the TPC commands for UCC-3 and UCC-4.

The sounding reference signal is allocated with cyclic radio resourcesfor each uplink carrier component. The information and the TPC commandconcerning the physical uplink shared channel of the uplink grantreceived using each of the downlink carrier components DCC-i (i=1, 2, 3,and 4) are for each of the uplink carrier components UCC-i (i=1, 2, 3,and 4) four sub frames after the reception of the uplink grant. The TPCcommands of the transmission power control formats received in thecommon search spaces of the anchor downlink component carriers DCC-2 andDDC-3 are for each of the uplink carrier components four sub framesafter the reception of the transmission power control formats.

As above, according to the embodiment, in the radio communicationsystem, the base station apparatus b2 groups the uplink carriercomponents in a similar environment based on the environment of each ofthe uplink carrier components such as the coverage of the uplink carriercomponent and interference from an adjacent base station apparatus b2and, therefore, is able to collectively transmit the TPC commands for anuplink carrier component group. Therefore, the control is able to beefficiently executed of the transmission power suitable for theenvironment of the uplink carrier components.

Second Reference Example

A second reference example of the present invention will now bedescribed in detail with reference to the accompanying drawings.

In the embodiment, the radio communication system has been described forthe case where the base station apparatus b1 sets the one downlinkcarrier component to be the anchor downlink component carrier, of theplurality of downlink carrier components allocated by the base stationapparatus b1 to the mobile station apparatus a1, and transmits thetransmission power control format using the one anchor downlinkcomponent carrier set. In the reference example, the case will bedescribed where a base station apparatus transmits the transmissionpower control format using one arbitrary downlink carrier component of aplurality of downlink carrier components allocated by the base stationapparatus to a mobile station apparatus.

Comparing the radio communication system according to the referenceexample with the radio communication system according to the embodiment,an upper layer processing portion of the mobile station apparatus and anupper layer processing portion of the base station apparatus differtherebetween. However, the configuration and the functions that each ofthe other components has are the same as those of the first embodiment.Therefore, the same functions as those of the embodiment will not againbe described. A mobile station apparatus according to the referenceexample will be referred to as “mobile station apparatus a3” and a basestation apparatus according thereto will be referred to as “base stationapparatus b3”.

FIG. 18 is a schematic block diagram of the configuration of the basestation apparatus b3 according to the second reference example of thepresent invention. Comparing an upper layer processing portion b31according to the reference example (FIG. 18) with the upper layerprocessing portion b11 according to the embodiment (FIG. 5), a radioresource control portion b311, a transmission power control portionb312, and a storing portion b313 are different between the upper layerprocessing portions b31 and b11. However, the functions that the othercomponents (the control portion b12, the reception processing portionb13, and the transmission processing portion b14) have are the same asthose of the embodiment. The same functions as those of the embodimentwill not again be described.

Processes of the upper layer processing portion b313 of the base stationapparatus b3 will be described.

In the reference example, the upper layer processing portion b313outputs the data information for each downlink carrier component to thetransmission processing portion b14. The upper layer processing portionb31 executes processes for the packet data convergence protocol layer,the radio link control layer, and the radio resource control) layer. Theradio resource control portion b311 of the upper layer processingportion b31 executes management, etc., of the various kinds of settinginformation, the communication state, and the buffer state of each ofthe mobile station apparatuses a3. The transmission power controlportion b312 of the upper layer processing portion b31 executesmanagement of the transmission power of the uplink of each of the mobilestation apparatuses a3. The storing portion b313 of the upper layerprocessing portion b31 has the various kinds of setting informationstored therein for each of the mobile station apparatuses a3 set by theradio resource control portion b311 and the transmission power controlportion b312.

In the above processes, the radio resource control portion b311 includedin the upper layer processing portion b31 allocates the plurality ofuplink carrier components and the plurality of downlink carriercomponents to the mobile station apparatus a3 according to the number ofdownlink carrier components and the number of uplink carrier componentsthat the base station apparatus b3 is able to use in the radiocommunication and the number of downlink carrier components and thenumber of uplink carrier components that the mobile station apparatus a2is able to simultaneously transmit or receive. The radio resourcecontrol portion b311 allocates the C-RNTI to identify the downlinkcontrol information for the mobile station apparatus a3, and theTPC-PUCCH-RNTI and the TPC-PUSCH-RNTI to identify the transmission powercontrol format for each anchor downlink component carrier, and the TPCcommand number, to the mobile station apparatus a3 and notifies themobile station apparatus a3 of this allocation.

The radio resource control portion b311 produces the control informationto execute control of the reception processing portion b13 and thetransmission processing portion b14 based on the uplink controlinformation (ACK/NACK, the channel quality information, the schedulingrequest, and the buffer state of the mobile station apparatus a3)notified of in the physical uplink control channel from the mobilestation apparatus a3 and the various kinds of setting information ofeach of the mobile station apparatuses a3 set by the radio resourcecontrol portion b311, and the radio resource control portion b311outputs the control information to the control portion b12. For example,when the transmission processing portion b14 allocates the transmissionpower control format, the radio resource control portion b311 outputsthe control information to the control portion b12 such that a downlinkcarrier component having excellent propagation path quality is selectedand the transmission power control format is allocated in the commonsearch space of the downlink carrier component selected.

In the above processes, the transmission power control portion b312included in the upper layer processing portion b31 produces thetransmission power control format by combining the TPC commands for themobile station apparatus a2 to which the same TPC-PUCCH-RNTIs or thesame TPC-PUSCH-RNTIs are allocated.

The storing portion b313 of the upper layer processing portion b31 hasthe various kinds of setting information stored therein for each of themobile station apparatuses a3 set by the radio resource control portionb311 and the transmission power control portion b312. FIG. 19 is adiagram of an example of the various kinds of setting information storedby the storing portion b313 according to the reference example. In FIG.19, pieces of setting information are stored for N mobile stationapparatuses (A1, A2, . . . , AN) and such items are stored in the formof a table as the identifiers (hexadecimal numbers) of theTPC-PUCCH-RNTI and the TPC-PUSCH-RNTI set for each of the mobile stationapparatuses a3 by the radio resource control portion b311 and thetransmission power control portion b312 of the upper layer processingportion b31, the number of each TPC command included in the transmissionpower control format that the uplink carrier component of each of themobile station apparatuses a3 corresponds to for each TPC-PUCCH-RNTI andeach TPC-PUSCH-RNTI, and the value of the transmission power currentlyinstructed to each of the mobile station apparatuses using the TPCcommands. The cells (grids) are blank for the number of the TPC commandfor the uplink carrier component not allocated by the base stationapparatus b3 to the mobile station apparatus a3, and transmission powertherefor.

For example, in FIG. 19, the storing portion b313 has such items storedtherein as the various kinds of setting information set by the radioresource control portion b311 and the transmission power control portionb312 for the mobile station apparatus A1, “0001” as the TPC-PUCCH-RNTI,“2” as the number of the TPC command for the physical uplink controlchannel for UCC-1, “0 dBm” as the value of the TPC command for thephysical uplink control channel of UCC-1, “3” as the number of the TPCcommand for the physical uplink control channel for UCC-2, “4 dBm” asthe value of the TPC command for the physical uplink control channel ofUCC-2, “4” as the number of the TPC command for the physical uplinkcontrol channel for UCC-3, “1 dBm” as the value of the TPC command forthe physical uplink control channel of UCC-3, “0002” as theTPC-PUSCH-RNTI, “1” as the number of the TPC command for the physicaluplink shared channel for UCC-1, “0 dBm” as the value of the TPC commandfor the physical uplink shared channel of UCC-1, “2” as the number ofthe TPC command for the physical uplink control channel for UCC-2, “4dBm” as the value of the TPC command for the physical uplink sharedchannel of UCC-2, “3” as the number of the TPC command for the physicaluplink control channel for UCC-3, and “1 dBm” as the value of the TPCcommand for the physical uplink control channel of UCC-3.

FIG. 20 is a schematic block diagram of the configuration of the mobilestation apparatus a3 according to the second reference example of thepresent invention. Comparing an upper layer processing portion a31according to the reference example (FIG. 20) with the upper layerprocessing portion a11 according to the embodiment (FIG. 7), a radioresource control portion a311 and a storing portion a313 are differentbetween the upper layer processing portions a31 and all. However, thefunctions that the other components (the transmission power controlportion a112, the control portion a12, the reception processing portiona13, and the transmission processing portion a14) have are same as thoseof the embodiment. The same functions as those of the embodiment willnot again be described.

Processes of the upper layer processing portion a31 of the mobilestation apparatus a3 will be described below.

In the reference example, the upper layer processing portion a31 outputsdata information of each uplink carrier component produced in responseto an operation of a user, etc., to the transmission processing portiona14. The upper layer processing portion a31 executes processes for thepacket data convergence protocol layer, the radio link control layer,and the radio resource control layer. The radio resource control portiona311 included in the upper layer processing portion a31 executesmanagement, etc., of the various kinds of setting information, thecommunication state, and the buffer state of the mobile stationapparatuses a3. The storing portion a313 of the upper layer processingportion a31 has the various kinds of setting information stored thereinof the mobile station apparatuses a3 managed by the radio resourcecontrol portion a311 and the transmission power control portion a112.

In the above processes, the radio resource control portion a311 includedin the upper layer processing portion a31 manages the various kinds ofsetting information such as the downlink carrier components and theuplink carrier components allocated to the mobile station apparatus a3,the C-RNTI, the TPC-PUCCH-RNTI, and the TPC-PUSCH-RNTI. The radioresource control portion a311 produces information to be allocated ineach channel of each uplink carrier component and outputs theinformation to the transmission processing portion b14 for each uplinkcarrier component.

The radio resource control portion a311 produces the control informationfor executing the control of the reception processing portion b13 andthe transmission processing portion b14 based on the downlink controlinformation notified of from the base station apparatus b3 using thephysical downlink control channel (for example, the downlink grant andthe uplink grant) and the various kinds of setting information for themobile station apparatus a3 managed by the radio resource controlportion a311, and outputs the control information to the control portionb12. For example, when the reception processing portion b13 monitors thephysical downlink control channel, the radio resource control portiona311 outputs the control information to the control portion b12 suchthat the reception processing portion b13 monitors the transmissionpower control format in the common search space of each of the downlinkcarrier components and monitors the downlink grant and the uplink grantaddressed to the mobile station apparatus a3 in the common search spaceand the user equipment-specific search space of each of the downlinkcarrier components.

The storing portion a313 of the upper layer processing portion a31 hasvarious kinds of setting information stored therein for the mobilestation apparatus a3 managed by the radio resource control portion a311and the transmission power control portion a112. FIG. 21 is a diagram ofan example of the various kinds of setting information stored by thestoring portion a313 according to the reference example. In FIG. 21,such items are stored in the form of a table as the identifiers(hexadecimal numbers) of the TPC-PUCCH-RNTI and the TPC-PUSCH-RNTI setin the mobile station apparatus a3 by the base station apparatus b3, andthe number of each TPC command included in the transmission powercontrol format that the uplink carrier component of the mobile stationapparatuses a3 corresponds to, for each TPC-PUCCH-RNTI and eachTPC-PUSCH-RNTI; and the value of the transmission power currentlyinstructed to the mobile station apparatuses a3 using the TPC command.

For example, in FIG. 16, the storing portion a313 has such items storedtherein as the various kinds of setting information set by the basestation apparatus b3 in the mobile station apparatus a3, “0001” as theTPC-PUCCH-RNTI, “2” as the number of the TPC command for the physicaluplink control channel for UCC-1, “0 dBm” as the value of the TPCcommand for the physical uplink control channel of UCC-1, “3” as thenumber of the TPC command for the physical uplink control channel forUCC-2, “4 dBm” as the value of the TPC command for the physical uplinkcontrol channel of UCC-2, “4” as the number of the TPC command for thephysical uplink shared channel for UCC-3, “1 dBm” as the value of theTPC command for the physical uplink control channel of UCC-3, “0002” asthe TPC-PUSCH-RNTI, “1” as the number of the TPC command for thephysical uplink shared channel for UCC-1, “0 dBm” as the value of theTPC command for the physical uplink shared channel of UCC-1, “2” as thenumber of the TPC command for the physical uplink control channel forUCC-2, “4 dBm” as the value of the TPC command for the physical uplinkshared channel of UCC-2, “3” as the number of the TPC command for thephysical uplink control channel for UCC-3, and “1 dBm” as the value ofthe TPC command for the physical uplink control channel of UCC-3.

FIG. 22 is a diagram of a method of applying a TPC command to a physicaluplink shared channel of the mobile station apparatus a3 according tothe reference example. FIG. 22 depicts the case where the mobile stationapparatus a3 is allocated with the downlink carrier components (DCC-1,DCC-2, and DCC-3) and the uplink carrier components (UCC-1, UCC-2, andUCC-3) as depicted in FIG. 2.

In FIG. 22, the axis of abscissas represents the time region, squaresadded therein with slant grid lines each represent a transmission powercontrol format including the TPC-PUSCH-RNTI allocated to the mobilestation apparatus a3, squares added therein with longitudinal andlateral grid lines each represent an uplink grant, squares added thereinwith slant lines each represent the physical uplink shared channel,squares added therein with dots each represent the sounding referencesignal, and thick arrows each represent the transmission power controlformat, the uplink carrier component that the TPC command for thephysical uplink shared channel and the sounding reference signalincluded in the uplink grant correspond to, and the time point at whichthe TPC command is applied with.

In FIG. 22, the TPC command included in the uplink grant received usingDCC-1 is for UCC-1; the TPC command included in the uplink grantreceived using DCC-2 is for the uplink grant for UCC-2; the TPC commandincluded in the uplink grant received using DCC-3 is for UCC-3; and thetransmission power control format received in the common search space ofeach of the downlink carrier components (DCC-1 DCC-2, and DCC-3)includes the TPC command for each of the uplink carrier components(UCC-1, UCC-2, and UCC-3). The mobile station apparatus a3 onlysimultaneously receives one transmission power control format.

The sounding reference signal is allocated with cyclic radio resourcesfor each uplink carrier component. The information and the TPC commandconcerning the physical uplink shared channel of the uplink grantreceived using each of the downlink carrier components DCC-i (i=1, 2,and 3) are for each of the uplink carrier components UCC-i (i=1, 2, and3) three sub frames after the reception of the uplink grant. The TPCcommand of the transmission power control format received in the commonsearch space of each of the downlink carrier components is for each ofthe uplink carrier components three sub frames after the reception ofthe transmission power control format.

As above, according to the reference example, in the radio communicationsystem, the transmission power control format is monitored using all thedownlink carrier components set in the mobile station apparatus a3 bythe base station apparatus b3 and, therefore, the base station apparatusb3 is able to allocate the transmission power control format in thecommon search spaces of all the downlink carrier components set in themobile station apparatus a3. Therefore, the degree of freedom of theallocation of the transmission power control format is able to beincreased enabling selection by the base station apparatus b3 of thedownlink carrier components each having excellent quality or selectionof the downlink carrier components each having a small amount ofoverhead for the physical downlink control channel.

In the embodiment, the base station apparatus b1 may set the anchordownlink component carriers allocated to the mobile station apparatus a1all to be same downlink carrier components. Thereby, the base stationapparatus b1 does not need to set and manage the anchor downlinkcomponent carrier for each of the mobile station apparatuses a1 and,therefore, the configuration of the base station apparatus b1 is able tobe simplified.

In the embodiment, the base station apparatus b1 configures thetransmission power control format using the plurality of TPC commandseach having the same number of bits. However, the base station apparatusb1 may configure a TPC command of a new format using fields of aplurality of PTC commands each having the same number of bits. The basestation apparatus b1 is able to set the fields of the plurality of TPCcommands for the uplink carrier components for each of the mobilestation apparatuses a1 use all of the bits of the fields of theplurality of TPC commands and, thereby, notify of the TPC command commonto the uplink carrier components, the TPC command for each of the uplinkcarrier components, etc. This format is determined in advance.Otherwise, this format is able to be set.

The base station apparatus b1 may set the configuration of the TPCcommand for each of the mobile station apparatuses a1 such as the numberof bits of the TPC command for the uplink carrier component and notifythe mobile station apparatus a1 of the configuration of the TPC commandset and the area (field) that includes the TPC command for the mobilestation apparatus a1 included in the transmission power control format.Thereby, the base station apparatus b1 is able to transmit the TPCcommand of the configuration suitable for each of the mobile stationapparatuses a1.

In the first reference example, the base station apparatus b2 mayconfigure a different group of the uplink carrier components for each ofthe mobile station apparatuses a2. Thereby, the transmission power maymore efficiently be controlled taking into account not only theenvironment of the uplink carrier, components but also the environmentof the mobile station apparatus a2.

The programs run in the base station apparatus and the mobile stationapparatuses concerning the present invention may also be programs thatcontrol a CPU (Central Processing Unit), etc., (programs that cause acomputer to function) such that the functions in the embodimentsconcerning the present invention are realized. The pieces of informationhandled by the apparatuses are temporarily accumulated in a RAM (RandomAccess Memory) during the processes thereafter, are stored in variousROMs (Read Only Memories) and HDDs (Hard Disk Drive) such as a flash ROMand are read, corrected, and written by the CPU when necessary.

A part of the mobile station apparatuses a1 to a3 and the base stationapparatuses b1 to b3 in the embodiments may be realized by computers. Insuch a case, a program to realize this control function may be recordedin a computer-readable recording medium a computer system may be causedto read and execute the program recorded in the recording medium and,thereby, the control function may be realized. The “computer system”used herein refers to a computer system that is incorporated in each ofthe mobile station apparatuses a1 to a3 or the base station apparatusesb1 to b3 and that includes an OS and hardware such as a peripheraldevice. The “computer-readable recording medium” refers to a portablemedium such as a flexible disc, a magneto-optical disc, a ROM, or aCD-ROM, or a storing apparatus such as a hard disc incorporated in thecomputer system. The “computer-readable recording medium” may include atype thereof that dynamically retains the programs for a short timeperiod such as a communication cable used when the programs aretransmitted through a network such as the Internet or a communicationline such as a telephone line and, in such a case, a type thereof thatretains the programs for a specific time period such as a volatilememory in a computer system used as a server or a client. The “programs”may be programs to realize a part of the above functions, or may also beprograms that are able to realize the part in combination with theprograms already recorded in the computer system.

A part or all of the mobile station apparatuses a1 to a3 and the basestation apparatuses b1 to b3 in the embodiments may typically berealized as an LSI that is an integrated circuit, or may be realized asa chip set formed by combining a plurality of integrated circuits. Eachof the functional blocks of the mobile station apparatuses a1 to a3 andthe base station apparatuses b1 to b3 may individually be implemented ina chip, or a part or all thereof may be integrated and implemented in achip. The approach of implementing those blocks in an integrated circuitis not limited to an LSI and those blocks may be realized by a dedicatedcircuit or a multi-purpose processor. When a technique of implementingthose blocks in an integrated circuit supersedes the LSI due to theadvancement of the semiconductor technology, the integrated circuit bythe technique may be used.

As above, the embodiment of the present invention has been described indetail with reference to the accompanying drawings. However, thespecific configuration thereof is not limited to the above and variousdesign changes, etc., are able to be made thereto within the scope notdeparting from the purview of the present invention.

EXPLANATIONS OF LETTERS OR NUMERALS

Mobile station apparatus . . . a1, a2, a3, base station apparatus . . .b1, b2, b3, upper layer processing portion . . . a11, a21, a31, radioresource control portion . . . a111, a211, a311, transmission powercontrol portion . . . a112, storing portion . . . a113, a213, a313,control portion . . . a12, reception processing portion . . . a13,transmission processing portion . . . a14, power amplifying portion . .. a141, upper layer processing portion . . . b11, b21, b31, radioresource control portion . . . b111, b211, b311, transmission powercontrol portion . . . b112, b212, b312, storing portion . . . b113,b213, b313, control portion . . . b12, reception processing portion b13,transmission processing portion b14.

The invention claimed is:
 1. A base station apparatus comprising: a control circuit configured to execute radio communication with a mobile station apparatus by using a plurality of downlink component carriers and a plurality of uplink component carriers; and a transmission circuit configured to transmit, to the mobile station apparatus, a physical downlink shared channel in any one downlink component carrier among the plurality of downlink component carriers, wherein the transmission circuit is configured to transmit, to the mobile station apparatus, downlink control information that includes information indicating allocation of radio resources to the physical downlink shared channel, and a Transmission Power Control (TPC) command, the TPC command is a command for a physical uplink control channel of an uplink component carrier among the plurality of uplink component carriers, the physical uplink control channel of the uplink component carrier is used for a transmission of Acknowledgement (ACK)/Negative-Acknowledgement (NACK) for the physical downlink shared channel, and the downlink control information is used for a scheduling of one physical downlink shared channel in one downlink component carrier.
 2. The base station apparatus according to claim 1, wherein the downlink control information is used for a scheduling of one physical downlink shared channel in only one downlink component carrier.
 3. A mobile station apparatus comprising: a control circuit configured to execute radio communication with a base station apparatus by using a plurality of downlink component carriers and a plurality of uplink component carriers; and a reception circuit configured to receive, from the base station apparatus, a physical downlink shared channel in any one downlink component carrier among the plurality of downlink component carriers, wherein the reception circuit is configured to receive, from the base station apparatus, downlink control information that includes information indicating allocation of radio resources to the physical downlink shared channel, and a Transmission Power Control (TPC) command, the TPC command is a command for a physical uplink control channel of an uplink component carrier among the plurality of uplink component carriers, the physical uplink control channel of the uplink component carrier is used for a transmission of Acknowledgement (ACK)/Negative-Acknowledgement (NACK) for the physical downlink shared channel, and the downlink control information is used for a scheduling of one physical downlink shared channel in one downlink component carrier.
 4. The mobile station apparatus according to claim 3, wherein the downlink control information is used for a scheduling of one physical downlink shared channel in only one downlink component carrier.
 5. A radio communication method for a base station apparatus, the radio communication method comprising: executing radio communication with a mobile station apparatus by using a plurality of downlink component carriers and a plurality of uplink component carriers; transmitting, to the mobile station apparatus, a physical downlink shared channel in any one downlink component carrier among the plurality of downlink component carriers; and transmitting, to the mobile station apparatus, downlink control information that includes information indicating allocation of radio resources to the physical downlink shared channel, and a Transmission Power Control (TPC) command, the TPC command is a command for a physical uplink control channel of an uplink component carrier among the plurality of uplink component carriers, the physical uplink control channel of the uplink component carrier is used for a transmission of Acknowledgement (ACK)/Negative-Acknowledgement (NACK) for the physical downlink shared channel, wherein the downlink control information is used for a scheduling of one physical downlink shared channel in one downlink component carrier.
 6. The radio communication method according to claim 5, wherein the downlink control information is used for a scheduling of one physical downlink shared channel in only one downlink component carrier.
 7. A radio communication method for a mobile station apparatus, the radio communication method comprising: executing radio communication with a base station apparatus by using a plurality of downlink component carriers and a plurality of uplink component carriers; receiving, from the base station apparatus, a physical downlink shared channel in any one downlink component carrier among the plurality of downlink component carriers; and receiving, from the base station apparatus, downlink control information that includes information indicating allocation of radio resources to the physical downlink shared channel, and a Transmission Power Control (TPC) command, the TPC command is a command for a physical uplink control channel of an uplink component carrier among the plurality of uplink component carriers, the physical uplink control channel of the uplink component carrier is used for a transmission of Acknowledgement (ACK)/Negative-Acknowledgement (NACK) for the physical downlink shared channel, wherein the downlink control information is used for a scheduling of one physical downlink shared channel in one downlink component carrier.
 8. The radio communication method according to claim 7, wherein the downlink control information is used for a scheduling of one physical downlink shared channel in only one downlink component carrier.
 9. An integrated circuit installed in a base station apparatus, the integrated circuit comprising: a control circuit configured to execute radio communication with a mobile station apparatus by using a plurality of downlink component carriers and a plurality of uplink component carriers; and a transmission circuit configured to transmit, to the mobile station apparatus, a physical downlink shared channel in any one downlink component carrier among the plurality of downlink component carriers, wherein the transmission circuit is configured to transmit, to the mobile station apparatus, downlink control information that includes information indicating allocation of radio resources to the physical downlink shared channel, and a Transmission Power Control (TPC) command, the TPC command is a command for a physical uplink control channel of an uplink component carrier among the plurality of uplink component carriers, the physical uplink control channel of the uplink component carrier is used for a transmission of Acknowledgement (ACK)/Negative-Acknowledgement (NACK) for the physical downlink shared channel, and the downlink control information is used for a scheduling of one physical downlink shared channel in one downlink component carrier.
 10. The integrated circuit according to claim 9, wherein the downlink control information is used for a scheduling of one physical downlink shared channel in only one downlink component carrier.
 11. An integrated circuit installed in a mobile station apparatus, the integrated circuit comprising: a control circuit configured to execute radio communication with a base station apparatus by using a plurality of downlink component carriers and a plurality of uplink component carriers; and a reception circuit configured to receive, from the base station apparatus, a physical downlink shared channel in any one downlink component carrier among the plurality of downlink component carriers, wherein the reception circuit is configured to receive, from the base station apparatus, downlink control information that includes information indicating allocation of radio resources to the physical downlink shared channel, and a Transmission Power Control (TPC) command, the TPC command is a command for a physical uplink control channel of an uplink component carrier among the plurality of uplink component carriers, the physical uplink control channel of the uplink component carrier is used for a transmission of Acknowledgement (ACK)/Negative-Acknowledgement (NACK) for the physical downlink shared channel, and the downlink control information is used for a scheduling of one physical downlink shared channel in one downlink component carrier.
 12. The integrated circuit according to claim 11, wherein the downlink control information is used for a scheduling of one physical downlink shared channel in only one downlink component carrier. 